A type of aluminum alloy anti-collision beam for automobiles

Abstract

This utility model discloses an aluminum alloy anti-collision beam for automobiles, belonging to the technical field of automotive anti-collision beams. It includes an arched main body with integrally formed mounting portions at both ends. The main body has a collapsible energy-absorbing structure. The collapsible energy-absorbing structure includes a first connecting plate integrally extended with the main body and a second connecting plate sleeved between the first connecting plates. The end of the second connecting plate is folded into an arc-shaped flange and fixed to the inner wall of the first connecting plate. A first cavity formed between the two plates contains multiple energy-absorbing plates. The first connecting plate consists of outer plates spaced apart along the width direction. The second connecting plate includes an inner plate and a top plate. The inner plate has an arc-shaped first collapsible energy-absorbing section. The energy-absorbing plates are spaced apart along the width direction of the main body, with guide sections and wave-shaped second collapsible energy-absorbing sections. This utility model, through its integrated design, achieves multi-level collapsible energy absorption within a limited space. It is suitable for micro-sized new energy vehicles, simplifying the manufacturing process, reducing costs, and improving collision safety and spatial adaptability.

Description

Technical Field

[0001] This utility model belongs to the field of automotive anti-collision beam technology, and particularly relates to an aluminum alloy anti-collision beam for automobiles. Background Technology

[0002] Existing micro new energy vehicles mainly target the low-price market, requiring strict control over overall vehicle costs. Simultaneously, their short wheelbase and short front end limit the space between the front bumper and the chassis, necessitating the provision of installation space for various intelligent devices. This leads some new energy vehicles to absorb collision energy through the collapse of the body frame (such as longitudinal beams) rather than relying on independent energy-absorbing boxes. The relatively heavy weight of the complex anti-collision beams significantly impacts range; therefore, some micro new energy vehicles omit the independent design of energy-absorbing boxes in their anti-collision beams, directly connecting them to the longitudinal beams.

[0003] However, this design of the anti-collision beam without an energy-absorbing box has the following problems: First, in a collision, it mainly relies on the collapse and energy absorption of the longitudinal beams, resulting in higher maintenance costs; Second, in a collision, the impact force acts directly on the vehicle frame, which may cause deformation of the passenger compartment and increase the risk of injury to the occupants; Third, in authoritative crash tests (such as China C-NCAP and Euro NCAP), the energy-absorbing box is an important indicator for evaluating the vehicle body structure design. Vehicles without an energy-absorbing box may lose points in projects such as "frontal collision" and "offset collision" due to unreasonable body collapse, making it difficult to obtain a high star rating.

[0004] Therefore, designers need to design an integrated energy-absorbing and collision-resistant anti-collision beam for micro new energy vehicles. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides an aluminum alloy anti-collision beam for automobiles, which is mainly an integrated aluminum alloy anti-collision beam with fewer manufacturing processes and energy-absorbing and collapsible functions.

[0006] The technical solution of this utility model is as follows:

[0007] An aluminum alloy anti-collision beam for automobiles includes an arched main body, with mounting portions at both ends along the length of the main body. The mounting portions are integrally formed with the main body, the main body has a collapsible energy-absorbing structure, and the mounting portions have mounting holes.

[0008] The collapsible energy-absorbing structure includes a first connecting plate integrally extended with the main body and a second connecting plate sleeved between the first connecting plates. One end of the second connecting plate extending into the first connecting plate is folded outward to form an arc-shaped flange. The side of the flange away from the second connecting plate is fixedly connected to the inner wall of the first connecting plate. Through the deformation of the connection position between the two sleeved connecting plates, a large-stroke collapsible energy-absorbing movement is performed. Upon collision, the second connecting plate is guided by the connected flange to collapse into the interior of the first connecting plate.

[0009] The first connecting plate and the second connecting plate form a first chamber. Multiple energy-absorbing plates are provided in the first chamber, forming a multi-level linkage system in which the first connecting plate is constrained, the second connecting plate collapses, and the energy-absorbing plates collapse synchronously, ensuring that energy is dissipated step by step along a preset path.

[0010] Furthermore, the first connecting plate includes two outer side plates spaced apart along the width direction of the main body. One end of the outer side plate is perpendicularly connected to the mounting part, and the other end is a free end that bends toward the second connecting plate. In the event of a collision, the collapse path of the second connecting plate is controlled. The bent section has a second chamber, which constitutes a collapse energy absorption zone. At the same time, the collapse path of the second connecting plate is controlled. The inner wall of the first connecting plate section near the free end is fixedly connected to the second connecting plate.

[0011] Furthermore, the second connecting plate includes two inner side plates spaced apart along the width direction of the main body. A top plate is fixedly connected between one end of the two inner side plates. The top plate has a planar structure, which facilitates the bending process of the bending machine. The other end is provided with the flange. The two ends of the flange are tangent to the first connecting plate and the second connecting plate, respectively, forming a boundary condition for a rigid connection through an arc transition. This allows the inner side plates to bend controllably along the flange arc direction under impact, causing the second connecting plate to collapse into the first connecting plate as a whole.

[0012] Furthermore, the two inner side plates have an arc-shaped first collapse energy-absorbing section between the top plate and the flange, making it a flexible weak area of ​​the inner side plate. The height of the first collapse energy-absorbing section along the height direction of the main body is less than the height of the first connecting plate along the same direction. During a collision, the inner side plate preferentially undergoes arc-shaped bending within the first connecting plate, and the collapse direction is controlled within the first connecting plate.

[0013] Furthermore, the thickness of the first connecting plate is greater than that of the second connecting plate, forming a stiffness gradient with a stronger outer layer and a weaker inner layer. This ensures that the first connecting plate remains rigid in the initial stage of the collision to transfer the load, while the second connecting plate deforms preferentially to guide the orderly absorption of energy and ensure that the energy absorption process is controllable.

[0014] Furthermore, the plurality of energy-absorbing plates include a first energy-absorbing plate, a second energy-absorbing plate, and a third energy-absorbing plate spaced apart along the width direction of the main body. The second energy-absorbing plate is located in the middle region of the width direction of the main body. The first and third energy-absorbing plates are symmetrically distributed on both sides of the second energy-absorbing plate with the vertical line of the second energy-absorbing plate as the symmetry reference. They are evenly distributed in the width direction of the main body to avoid structural instability caused by unilateral overload, while ensuring sufficient deformation space for the three energy-absorbing plates.

[0015] Furthermore, each of the multiple energy-absorbing plates is provided with a guide section and a second collapse energy-absorbing section. The second collapse energy-absorbing section has a wave-shaped structure and is located away from the mounting part. The thickness of the guide section is greater than the thickness of the second collapse energy-absorbing section. The larger thickness of the guide section serves as a rigid area to guide the impact force to concentrate on the wave-shaped second collapse energy-absorbing section. The wave-shaped structure absorbs high-energy impacts through multi-curvature fold deformation, and its design away from the mounting part ensures sufficient deformation space.

[0016] The beneficial effects of this utility model are as follows:

[0017] 1. In this utility model, the outer side plate (first connecting plate) and the inner side plate (second connecting plate) are fixed together by an arc-shaped flange. The arc-shaped flange serves as a key guiding structure. Combined with the arc-shaped collapse section of the inner side plate (the height of which is less than that of the outer side plate) and the thickness advantage of the outer side plate, it precisely guides the inner side plate to collapse inward along the arc, making the deformation path strictly controllable.

[0018] 2. This utility model forms initial energy absorption by arc bending of the inner side plate's collapsible section. The symmetrically distributed wave-shaped energy-absorbing plates in the cavity dissipate energy through the depth of folding deformation. The outer side plate's bent section has a second chamber for further energy absorption. Then, through the deformation of the connection position between the two sleeved connecting plates, a large-stroke collapsible energy-absorbing movement is carried out, constructing a multi-layer energy-absorbing network. By extending the energy absorption time through orderly deformation, it effectively protects the vehicle body and occupants' safety and improves the overall energy absorption effect.

[0019] 3. This utility model avoids structural instability caused by unilateral overload by using a first energy-absorbing plate, a second energy-absorbing plate, and a third energy-absorbing plate that are spaced apart along the width direction of the main body.

[0020] 4. One end of the outer side plate of this utility model is perpendicularly connected to the mounting part, and the other end is a free end that bends towards the second connecting plate. In the event of a collision, it effectively controls the collapse path of the second connecting plate and avoids collapse failure. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model.

[0022] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0023] Reference numerals: 1. Main body; 1-1. First connecting plate; 1-1.1. Second chamber; 1-2. Second connecting plate; 1-2.1. Flanged edge; 1-2.2. Inner side plate; 1-2.2.1. First collapsible energy-absorbing section; 1-2.3. Top plate; 2. Mounting part; 3. First chamber; 4. Energy-absorbing plate; 4-1. First energy-absorbing plate; 4-1.1. Second collapsible energy-absorbing section; 4-1.2. Guide section; 4-2. Second energy-absorbing plate; 4-3. Third energy-absorbing plate. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] like Figures 1 to 2 As shown, an aluminum alloy anti-collision beam for automobiles includes an arched main body 1, with mounting parts 2 at both ends along the length of the main body 1. The mounting parts 2 are integrally formed with the main body 1. The main body 1 has a collapsible energy-absorbing structure, and the mounting parts 2 are provided with mounting holes.

[0026] The collapsible energy-absorbing structure includes a first connecting plate 1-1 extending integrally with the main body 1 and a second connecting plate 1-2 sleeved between the first connecting plates 1-1. One end of the second connecting plate 1-2 extending into the first connecting plate 1-1 is folded outward to form an arc-shaped flange 1-2.1. The side of the flange 1-2.1 away from the second connecting plate 1-2 is fixedly connected to the inner wall of the first connecting plate 1-1. Through the deformation of the connection position between the two sleeved connecting plates, a large-stroke collapsible energy-absorbing movement is performed. During the collision, the second connecting plate 1-2 is guided by the connected flange 1-2.1 to collapse into the first connecting plate 1-1.

[0027] The first connecting plate 1-1 and the second connecting plate 1-2 form a first chamber 3. The first chamber 3 is equipped with multiple energy-absorbing plates 4, forming a multi-level linkage system in which the first connecting plate 1-1 is constrained, the second connecting plate 1-2 collapses, and the energy-absorbing plates 4 collapse synchronously, ensuring that energy is dissipated step by step along a preset path.

[0028] Furthermore, the first connecting plate 1-1 includes two outer side plates spaced apart along the width direction of the main body 1. One end of the outer side plate is perpendicularly connected to the mounting part 2, and the other end is a free end that bends toward the second connecting plate 1-2. During a collision, the collapse path of the second connecting plate 1-2 is controlled. The bent section has a second chamber 1-1.1, which constitutes a collapse energy absorption zone. At the same time, the collapse path of the second connecting plate 1-2 is controlled. The inner wall of the first connecting plate 1-1 section near the free end is fixedly connected to the second connecting plate 1-2.

[0029] Furthermore, the second connecting plate 1-2 includes two inner side plates 1-2.2 spaced apart along the width direction of the main body 1. A top plate 1-2.3 is fixedly connected between one end of the two inner side plates 1-2.2. The top plate 1-2.3 has a planar structure, which facilitates the bending process of the bending machine. The other end is provided with a flange 1-2.1. The two ends of the flange 1-2.1 are tangent to the first connecting plate 1-1 and the second connecting plate 1-2 respectively, forming a boundary condition of rigid connection with a circular arc transition. This allows the inner side plate 1-2.2 to bend controllably along the arc direction of the flange 1-2.1 under impact, causing the second connecting plate 1-2 as a whole to collapse into the first connecting plate 1-1.

[0030] Furthermore, the two inner side plates 1-2.2 have an arc-shaped first collapse energy-absorbing section 1-2.2.1 between the top plate 1-2.3 and the flange 1-2.1, making it a flexible weak area of ​​the inner side plate 1-2.2. The height of the first collapse energy-absorbing section 1-2.2.1 along the height direction of the main body 1 is less than the height of the first connecting plate 1-1 along the same direction. During the collision, the inner side plate 1-2.2 preferentially undergoes arc-shaped bending within the first connecting plate 1-1, and the collapse direction is controlled within the first connecting plate 1-1.

[0031] Furthermore, the thickness of the first connecting plate 1-1 is greater than that of the second connecting plate 1-2, forming a stiffness gradient with a stronger outer layer and a weaker inner layer. This ensures that the first connecting plate 1-1 remains rigid in the initial stage of the collision to transfer the load, while the second connecting plate 1-2 deforms first, guiding the orderly absorption of energy and ensuring that the energy absorption process is controllable.

[0032] Furthermore, the multiple energy-absorbing plates 4 include a first energy-absorbing plate 4-1, a second energy-absorbing plate 4-2, and a third energy-absorbing plate 4-3, which are spaced apart along the width direction of the main body 1. The second energy-absorbing plate 4-2 is located in the middle region of the width direction of the main body 1. The first energy-absorbing plate 4-1 and the third energy-absorbing plate 4-3 are symmetrically distributed on both sides of the second energy-absorbing plate 4-2 with the vertical line of the second energy-absorbing plate 4-2 as the symmetry reference. They are evenly distributed in the width direction of the main body 1 to avoid structural instability caused by unilateral overload, while ensuring sufficient deformation space for the three energy-absorbing plates 4.

[0033] Furthermore, each of the multiple energy-absorbing plates 4 is provided with a guide section 4-1.2 and a second collapse energy-absorbing section 4-1.1. The second collapse energy-absorbing section 4-1.1 has a wave-shaped structure and is located away from the mounting part 2. The thickness of the guide section 4-1.2 is greater than the thickness of the second collapse energy-absorbing section. The larger thickness of the guide section 4-1.2 serves as a rigid area to guide the impact force to concentrate on the wave-shaped second collapse energy-absorbing section 4-1.1. The wave-shaped structure absorbs high-energy impacts through multi-curvature fold deformation, and its design away from the mounting part 2 ensures sufficient deformation space.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An automobile aluminum alloy bumper beam comprising a main body portion having mounting portions at both ends in the longitudinal direction thereof, characterized by The mounting part is integrally formed with the main body, and the main body has a collapsible energy-absorbing structure. The collapsible energy-absorbing structure includes a first connecting plate that extends integrally with the main body and a second connecting plate sleeved between the first connecting plates. One end of the second connecting plate that extends into the first connecting plate is folded outward to form an arc-shaped flange. The side of the flange away from the second connecting plate is fixedly connected to the inner wall of the first connecting plate. The first connecting plate and the second connecting plate form a first chamber, and multiple energy-absorbing plates are provided in the first chamber.

2. The automotive aluminum alloy anti-collision beam according to claim 1, characterized in that, The first connecting plate includes two outer side plates spaced apart along the width direction of the main body. One end of the outer side plate is perpendicularly connected to the mounting part, and the other end is a free end that bends toward the second connecting plate. The bent section has a second chamber, and the inner wall of the first connecting plate section near the free end is fixedly connected to the second connecting plate.

3. The automotive aluminum alloy anti-collision beam according to claim 2, characterized in that, The second connecting plate includes two inner side plates spaced apart along the width direction of the main body. A top plate is fixedly connected between one end of the two inner side plates, and the other end is provided with the flange. The two ends of the flange are tangent to the first connecting plate and the second connecting plate, respectively.

4. The automotive aluminum alloy anti-collision beam according to claim 3, characterized in that, The two inner side plates have an arc-shaped first collapsible energy-absorbing section between the top plate and the flange. The height of the first collapsible energy-absorbing section along the height direction of the main body is less than the height of the first connecting plate along the same direction.

5. The automotive aluminum alloy anti-collision beam according to claim 1, characterized in that, The thickness of the first connecting plate is greater than the thickness of the second connecting plate.

6. The automotive aluminum alloy anti-collision beam according to claim 1, characterized in that, The plurality of energy-absorbing plates include a first energy-absorbing plate, a second energy-absorbing plate, and a third energy-absorbing plate that are spaced apart along the width direction of the main body. The second energy-absorbing plate is located in the middle region of the width direction of the main body. The first energy-absorbing plate and the third energy-absorbing plate are symmetrically distributed on both sides of the second energy-absorbing plate with the vertical line of the second energy-absorbing plate as the symmetry reference.

7. The automotive aluminum alloy anti-collision beam according to claim 6, characterized in that, Each of the multiple energy-absorbing plates is provided with a guide section and a second collapsible energy-absorbing section. The second collapsible energy-absorbing section has a wave-shaped structure and is located away from the mounting part.

8. The automotive aluminum alloy anti-collision beam according to claim 7, characterized in that, The thickness of the guide section is greater than the thickness of the second collapsible energy-absorbing section.

9. The automotive aluminum alloy anti-collision beam according to claim 1, characterized in that, The main body is arched.

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