Aluminum profile for automobile doorsill beam
By designing the internal cavity, protective cavity, and buffer cavity structure of the aluminum profile for the car door sill beam, the problem of the inability to buffer side impacts in existing technologies has been solved, achieving effective absorption and dispersion of impact force and improving the safety of the car.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG FULIHUA ALUMINUM CO LTD
- Filing Date
- 2025-05-19
- Publication Date
- 2026-05-12
AI Technical Summary
Existing car door sill beams cannot effectively cushion the impact during side collisions, leading to inner compression and deformation, which affects safety.
An aluminum profile for automotive door sill beams has been designed, comprising an inner cavity, a protective cavity, and a buffer cavity. The inner cavity is equipped with a reinforcing cross plate, the protective cavity is equipped with reinforcing ribs, and the buffer cavity is equipped with a deformable plate. These structures absorb and disperse impact forces.
It effectively absorbs impact force, reduces the impact force transmitted to the inner cavity, prevents components such as the battery pack from being squeezed and deformed, and improves vehicle safety.
Smart Images

Figure CN224225148U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of aluminum profiles, and in particular to the technical field of aluminum profiles for automobile door sill beams. Background Technology
[0002] The door sill beam is an important component of the car body. Its strength and energy absorption effect directly affect the deformation of the passenger compartment during a side collision, and thus affect the safety of the car in a side collision.
[0003] Existing car door sill beams are unable to effectively buffer the impact force when subjected to a side impact, resulting in the inner side of the door being squeezed and deformed. Summary of the Invention
[0004] The purpose of this utility model is to solve the problems in the prior art by proposing an aluminum profile for automobile door sill beams that can solve the above problems.
[0005] To achieve the above objectives, this utility model proposes an aluminum profile for an automotive door sill beam, comprising a door sill beam body. The door sill body is provided with an inner cavity, a protective cavity, and a buffer cavity from the inside out. The inner cavity is provided with several reinforcing horizontal plates. The protective cavity is provided with reinforcing protective ribs, which are zigzag-shaped. The buffer cavity is provided with a connecting plate. The buffer cavity is provided with several first deformable plates and several second deformable plates, which are arranged in a one-to-one correspondence. The first deformable plates and second deformable plates are arranged in an X-shape on both sides of the connecting plate.
[0006] Preferably, the bottom of the inner chamber is provided with an installation groove.
[0007] Preferably, the buffer chamber has V-shaped grooves on both sides.
[0008] Preferably, the reinforcing ribs divide the cross-section of the protective chamber into several triangles.
[0009] The beneficial effects of this utility model are as follows: When the present utility model is impacted, the deformation plate in the buffer chamber will deform to absorb the impact force, and the inner chamber will be protected by the reinforcing ribs in the protective chamber, effectively preventing the inner chamber from being squeezed and deformed.
[0010] The features and advantages of this utility model will be described in detail through embodiments and accompanying drawings. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the structure of this utility model.
[0012] In the diagram: 1. Threshold beam main body; 2. Inner cavity; 3. Protective cavity; 4. Buffer cavity; 5. Reinforcing horizontal plate; 6. V-groove; 7. Reinforcing protective rib; 8. Connecting plate; 9. First deformation plate; 10. Second deformation plate. Detailed Implementation
[0013] See Figure 1 An aluminum profile for an automotive door sill beam includes a door sill beam body 1. The door sill body is provided with an inner cavity 2, a protective cavity 3, and a buffer cavity 4 from the inside out. The inner cavity 2 is provided with several reinforcing horizontal plates 5. The protective cavity 3 is provided with reinforcing protective ribs 7, which are zigzag-shaped. The buffer cavity 4 is provided with a connecting plate 8. The buffer cavity 4 is provided with several first deformable plates 9 and several second deformable plates 10. The first deformable plates 9 and the second deformable plates 10 are arranged in a one-to-one correspondence and are arranged in an X shape on both sides of the connecting plate 8.
[0014] The bottom of the inner chamber 2 is provided with an installation groove.
[0015] The buffer chamber 4 has V-shaped grooves 6 on both sides.
[0016] The reinforcing rib 7 divides the cross-section of the protective chamber 3 into several triangles.
[0017] Both the first and second deformable plates are V-shaped plates, with the included angle of the V-shape of the first deformable plate being smaller than that of the second deformable plate.
[0018] This invention provides double protection for the inner chamber through a protective chamber and a buffer chamber, reducing the impact force transmitted to the inner chamber and preventing the battery pack from being squeezed.
[0019] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.
Claims
1. An aluminum profile for an automobile door sill beam, characterized in that: The sill beam body (1) includes an inner cavity (2), a protective cavity (3) and a buffer cavity (4) arranged sequentially from the inside to the outside. The inner cavity (2) is provided with several reinforcing horizontal plates (5). The protective cavity (3) is provided with reinforcing protective ribs (7). The reinforcing protective ribs (7) are in the shape of a broken line. The buffer cavity (4) is provided with a connecting plate (8). The buffer cavity (4) is provided with several first deformable plates (9) and several second deformable plates (10). The first deformable plates (9) and the second deformable plates (10) are arranged in a one-to-one correspondence. The first deformable plates (9) and the second deformable plates (10) are arranged in an X shape on both sides of the connecting plate (8).
2. The aluminum profile for automobile door sill beams as described in claim 1, characterized in that: The bottom of the inner chamber (2) is provided with an installation groove.
3. The aluminum profile for automobile door sill beams as described in claim 1, characterized in that: The buffer chamber (4) has V-shaped grooves (6) on both sides.
4. The aluminum profile for automobile door sill beams as described in claim 1, characterized in that: The reinforcing rib (7) divides the cross-section of the protective chamber (3) into several triangles.