Aluminum alloy high-strength doorsill beam

Abstract

The invention discloses an aluminum alloy high-strength doorsill beam which comprises a beam body, a first reinforcing shell and a second reinforcing shell. One side of the cross section of the beam body is provided with an outwards-protruding structure defined by two bevel edges and a vertical edge, a right triangle reinforcing rib piece is formed in the beam body through a first transverse rib, a second transverse rib, a vertical rib and an inclined rib, the force flow path is optimized through the stability of a triangle, and the bending resistance and the impact resistance are improved. The first reinforcing shell and the second reinforcing shell are matched with the left side wall and the right side wall of the beam body correspondingly, the penetrating columns on the inner sides of the first reinforcing shell and the second reinforcing shell and the butt joint caps are rigidly fixed through detachable connection penetrating beam body rib structures, and a shell-rib body composite stress system is formed. The convex structure enhances the section rigidity; a groove in the inner side of the reinforcing shell is matched with the outline of the beam body to ensure tight fitting; the internal ribs and the beam body are integrally formed, and stress concentration is reduced. The structure has the characteristics of high strength, light weight and convenient assembly, is suitable for an automobile body threshold, and effectively improves the side collision safety and the maintenance convenience.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile production, and in particular to an aluminum alloy high-strength door sill beam. Background Art

[0002] In the automotive industry, sill beams, as key components of the vehicle body structure, primarily undertake important functions such as resisting side impacts, supporting the vehicle body, and transferring loads. With the automotive industry's increasing demands for safety and lightweighting, aluminum alloys, due to their low density and high strength, have gradually become an ideal material for sill beams. However, existing aluminum alloy sill beams still have some shortcomings in their structural design. For example, the internal reinforcement structure of some sill beams is not reasonably laid out, resulting in an inability to effectively disperse stress when impacted, affecting vehicle body safety. The assembly methods of some sill beams are complex, making them difficult to quickly assemble and disassemble, increasing production costs and making maintenance more difficult. Therefore, there is an urgent need to design an aluminum alloy sill beam with high structural strength and easy assembly to meet the growing demands of the automotive industry. Summary of the Invention

[0003] In order to solve the technical problems existing in the background technology, the present invention provides an aluminum alloy high-strength door sill beam.

[0004] The present invention provides an aluminum alloy high-strength door sill beam, comprising a beam body, a first reinforcement shell and a second reinforcement shell;

[0005] An outer side wall of one side of the cross section of the beam body is provided with an outward convex structure, and the outward convex structure is surrounded by two oblique sides and one vertical side; a first transverse rib and a second transverse rib are connected between the two side walls of the beam body, a vertical rib is connected between the top side of the beam body and the second transverse rib, and the vertical rib and the first transverse rib form an intersection; an oblique rib is connected between the top side of the beam body and the oblique surface of the lower part of the outward convex structure, and the oblique rib, the first transverse rib and the vertical rib together form a right-angled triangle reinforcement member;

[0006] The first reinforcing shell is adapted to the left outer side wall of the beam body, and the second reinforcing shell is adapted to the right outer side wall of the beam body; a plurality of groups of through columns are arranged horizontally and equidistantly on the same horizontal plane in the middle of the inner side wall of the first reinforcing shell, and a plurality of groups of docking caps are arranged horizontally and equidistantly on the same horizontal plane in the middle of the inner side wall of the second reinforcing shell, and the through columns and the docking caps correspond one to one; each group of the through columns sequentially penetrates the left outer side wall of the beam body, the vertical ribs, the oblique ribs and the vertical edge of the convex structure, and is detachably connected to the corresponding docking cap.

[0007] Preferably, the two oblique sides of the outward convex structure are respectively connected to the outer side walls of the top and bottom sides of the beam body to form a trapezoidal convexity with a top width smaller than a bottom width.

[0008] Preferably, the aluminum alloy high-strength sill beam according to claim 1 is characterized in that the first transverse rib and the second transverse rib are arranged in parallel and perpendicular to the two side walls of the beam body, and the first transverse rib is located above the second transverse rib and intersects with the middle part of the vertical rib.

[0009] Preferably, the aluminum alloy high-strength sill beam according to claim 1 is characterized in that, in the right-angled triangle reinforcement rib, the vertical rib is a right-angled side perpendicular to the first horizontal rib, the oblique rib is a hypotenuse connecting the top side of the beam body and the inclined surface of the convex structure, the first horizontal rib is another right-angled side arranged horizontally, and the right-angled triangle reinforcement rib is a solid rib.

[0010] Preferably, the aluminum alloy high-strength sill beam according to claim 1 is characterized in that the through column and the docking cap are detachably connected by a threaded connection.

[0011] Preferably, the aluminum alloy high-strength sill beam according to claim 1 is characterized in that the inner side walls of the first reinforcement shell and the second reinforcement shell are both provided with grooves matching the contours of the outer side walls of the beam body, and the depth of the grooves is adapted to the thickness of the outer side walls of the beam body.

[0012] Preferably, the aluminum alloy high-strength sill beam according to claim 1 is characterized in that the vertical ribs, oblique ribs, first transverse ribs and second transverse ribs are all integrally formed with the beam body to form an internal reinforcement rib network structure.

[0013] Preferably, the aluminum alloy high-strength sill beam according to claim 1 is characterized in that the length of the through column is greater than the distance from the left outer wall to the right outer wall of the beam body, and the inner side of the docking cap is provided with a limiting structure that cooperates with the end of the through column.

[0014] In the present invention, a high-strength aluminum alloy sill beam is proposed with high strength and high stability: by arranging right-angled triangular reinforcement members composed of horizontal ribs, vertical ribs and oblique ribs inside the beam body, as well as an outward-convex trapezoidal structure, the top load can be effectively dispersed, the bending and impact resistance of the sill beam is improved, the stability of the overall structure is enhanced, and it can better resist side collisions and ensure the safety of people in the car.

[0015] Right triangle structure: The oblique reinforcement is the hypotenuse, and the vertical reinforcement and the first horizontal reinforcement are right-angled sides. This layout allows the load to be transferred to the vertical reinforcement and horizontal reinforcement through the oblique reinforcement, avoiding single-point stress.

[0016] Made of aluminum alloy and optimized with reasonable structural design, the weight of the sill beam is reduced while ensuring strength, which helps to achieve lightweighting of the car and improve fuel economy. The first and second reinforced shells are connected to the beam body through threaded connections between the through-column and the butt cap.

[0017] Through-columns rigidly connect the left and right reinforced shells to the internal reinforcement structure of the beam body, forming a composite "shell-reinforcement" force-bearing system, enhancing overall strength. Removable connections facilitate assembly and maintenance while ensuring the structure's disassembly.

[0018] Assembly is quick and easy; the detachable connection facilitates later repairs and replacement of damaged parts, reducing maintenance costs. Internal reinforcement ribs are integrally formed with the beam, reducing weak points at the connection. Grooves ensure a tight fit between the outer shell and the beam, while retaining structures extending through the column ends prevent loosening, further enhancing the reliability and durability of the sill beam structure.

[0019] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention;

[0021] Figure 2 An exploded view of the present invention;

[0022] Figure 3 It is an exploded view of the present invention.

[0023] Explanation of the numbers in the figure: 1. Beam body; 101. First transverse reinforcement; 102. Second transverse reinforcement; 103. Diagonal reinforcement; 104. Vertical reinforcement; 2. First reinforcing shell; 201. Through column; 3. Second reinforcing shell; 301. Butt cap. DETAILED DESCRIPTION

[0024] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention, and are not to be construed as limiting the present invention.

[0025] like Figure 1-Figure 3 The illustrated embodiment of a high-strength aluminum alloy sill beam comprises a beam body 1, a first reinforcement shell 2, and a second reinforcement shell 3. The outer sidewall of one side of the cross-section of the beam body 1 is provided with an outwardly projecting structure, which is formed by two oblique sides and a vertical side. A first transverse rib 101 and a second transverse rib 102 are connected between the two side walls of the beam body 1. A vertical rib 104 is connected between the top side of the beam body 1 and the second transverse rib 102, where the vertical rib 104 intersects with the first transverse rib 101. An oblique rib 103 is connected between the top side of the beam body 1 and the oblique surface below the outwardly projecting structure. Together, the oblique rib 103, the first transverse rib 101, and the vertical rib 104 form a right-angled triangular reinforcement member.

[0026] The first reinforcing shell 2 is adapted to the left outer side wall of the beam body 1, and the second reinforcing shell 3 is adapted to the right outer side wall of the beam body 1; a plurality of groups of through columns 201 are arranged horizontally and equidistantly on the same horizontal plane in the middle of the inner side wall of the first reinforcing shell 2, and a plurality of groups of docking caps 301 are arranged horizontally and equidistantly on the same horizontal plane in the middle of the inner side wall of the second reinforcing shell 3, and the through columns 201 correspond to the docking caps 301 one by one; each group of through columns 201 sequentially penetrates the left outer side wall of the beam body 1, the vertical ribs 104, the oblique ribs 103 and the vertical edge of the convex structure, and is detachably connected to the corresponding docking caps 301.

[0027] Furthermore, the two oblique sides of the convex structure are respectively connected to the outer side walls of the top and bottom sides of the beam body 1, forming a trapezoidal convexity with a top width smaller than a bottom width. This trapezoidal convexity structure can effectively improve the bending stiffness of the beam body 1 without increasing the amount of material used.

[0028] The first transverse reinforcement 101 and the second transverse reinforcement 102 are arranged in parallel and perpendicular to the two side walls of the beam body 1. The first transverse reinforcement 101 is located above the second transverse reinforcement 102 and intersects with the middle of the vertical reinforcement 104. This layout allows the beam body 1 to evenly distribute the load when subjected to a transverse load through the coordinated action of the transverse reinforcement and the vertical reinforcement 104.

[0029] In the right-angled triangle reinforcement member, the vertical rib 104 is a right-angled side perpendicular to the first transverse rib 101, the oblique rib 103 is the hypotenuse connecting the top side of the beam body 1 with the inclined surface of the convex structure, and the first transverse rib 101 is the other right-angled side arranged horizontally. The right-angled triangle reinforcement member is a solid rib. The solid right-angled triangle reinforcement member can fully utilize the stability of the triangular structure and enhance the deformation resistance of the beam body 1.

[0030] The through-column 201 and the butt-joint cap 301 are detachably connected by a threaded connection. The threaded connection has the advantages of being firmly connected and easily disassembled, and is convenient for assembling and repairing the threshold beam.

[0031] The inner sidewalls of the first and second reinforcement shells 2 and 3 are each provided with a groove that matches the contour of the outer sidewall of the beam body 1. The groove depth is adapted to the thickness of the outer sidewall of the beam body 1. This design enables the reinforcement shells to fit tightly against the beam body 1, further improving the overall strength of the sill beam.

[0032] The vertical reinforcement 104, the oblique reinforcement 103, the first transverse reinforcement 101 and the second transverse reinforcement 102 are all integrally formed with the beam body 1 to form an internal reinforcement network structure. The integral forming method reduces the stress concentration problem caused by welding or splicing, and improves the reliability of the structure.

[0033] The length of the through-post 201 is greater than the distance from the left outer wall to the right outer wall of the beam body 1, and the inner side of the docking cap 301 is provided with a limit structure that cooperates with the end of the through-post 201. The limit structure can prevent the through-post 201 from loosening during use, ensuring the stability of the threshold beam structure.

[0034] Example 1

[0035] In this embodiment, the beam body 1 of the high-strength aluminum alloy sill beam is manufactured using an extrusion process. The vertical ribs 104, diagonal ribs 103, first transverse ribs 101, and second transverse ribs 102 are integrally formed with the beam body 1. The outward projection on one side of the cross-section of the beam body 1 is a trapezoidal protrusion, with two oblique sides connected to the outer side walls of the top and bottom of the beam body 1, respectively. The top width is smaller than the bottom width. This trapezoidal protrusion structure effectively improves the bending resistance of the beam body 1.

[0036] The first and second reinforced shells 2 and 3 are formed by die stamping. Their inner walls are provided with grooves that match the contours of the outer walls of the beam body 1. The groove depth is precisely designed to ensure a tight fit between the reinforced shells and the beam body 1. Multiple sets of through-pillars 201 are equidistantly positioned laterally in the middle of the inner wall of the first reinforced shell 2. Multiple sets of docking caps 301 are positioned in corresponding positions on the inner wall of the second reinforced shell 3. The number and position of the through-pillars 201 and the docking caps 301 correspond exactly.

[0037] During assembly, the through-column 201 of the first reinforcing shell 2 is aligned with the pre-set hole in the left outer wall of the beam body 1. It then passes through the left outer wall, vertical ribs 104, diagonal ribs 103, and the vertical edge of the protruding structure. It is then screwed into the butt cap 301 on the inside of the second reinforcing shell 3. This securely connects the first reinforcing shell 2, beam body 1, and second reinforcing shell 3 into a single, integrated structure, forming a high-strength aluminum alloy threshold beam structure.

[0038] Example 2

[0039] This embodiment has essentially the same structure as the first embodiment, differing in that the right-angled triangular reinforcement members have been further optimized. In this embodiment, the surfaces of the right-angled triangular reinforcement members are anodized to improve their wear and corrosion resistance. Furthermore, a circular arc transition design is employed at the junctions between the diagonal ribs 103, the top side of the beam body 1, and the inclined surface of the convex structure to reduce stress concentration and further enhance the strength and reliability of the reinforcement members.

[0040] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0042] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0043] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0044] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A high-strength aluminum alloy threshold beam, characterized by: It comprises a beam body (1), a first reinforced shell (2) and a second reinforced shell (3); An outer side wall of one side of the cross section of the beam body (1) is provided with an outward convex structure, and the outward convex structure is surrounded by two oblique sides and one vertical side; a first transverse rib (101) and a second transverse rib (102) are connected between the two side walls of the beam body (1); a vertical rib (104) is connected between the top side of the beam body (1) and the second transverse rib (102), and the vertical rib (104) and the first transverse rib (101) form an intersection; an oblique rib (103) is connected between the top side of the beam body (1) and the oblique surface of the lower part of the outward convex structure, and the oblique rib (103), the first transverse rib (101) and the vertical rib (104) together form a right-angled triangle reinforcement member; The first reinforcing shell (2) is adapted to the left outer side wall of the beam body (1), and the second reinforcing shell (3) is adapted to the right outer side wall of the beam body (1); a plurality of groups of through-columns (201) are arranged at equal intervals on the same horizontal plane in the middle of the inner side wall of the first reinforcing shell (2), and a plurality of groups of docking caps (301) are arranged at equal intervals on the same horizontal plane in the middle of the inner side wall of the second reinforcing shell (3), and the through-columns (201) and the docking caps (301) correspond to each other one by one; each group of through-columns (201) sequentially penetrates the left outer side wall of the beam body (1), the vertical ribs (104), the oblique ribs (103) and the vertical edge of the convex structure, and is then detachably connected to the corresponding docking cap (301).

2. The aluminum alloy high-strength door sill beam according to claim 1, characterized in that: The two oblique sides of the convex structure are respectively connected to the outer side walls of the top and bottom sides of the beam body (1), forming a trapezoidal convexity with a top width smaller than a bottom width.

3. The aluminum alloy high-strength door sill beam according to claim 1, characterized in that: The first transverse reinforcement (101) and the second transverse reinforcement (102) are arranged in parallel and perpendicular to the two side walls of the beam body (1); the first transverse reinforcement (101) is located above the second transverse reinforcement (102) and intersects with the middle of the vertical reinforcement (104).

4. The aluminum alloy high-strength door sill beam according to claim 1, characterized in that: In the right-angled triangle reinforcement rib member, the vertical rib (104) is a right-angled side perpendicular to the first transverse rib (101), the oblique rib (103) is a hypotenuse connecting the top side of the beam body (1) and the inclined surface of the convex structure, the first transverse rib (101) is another right-angled side arranged horizontally, and the right-angled triangle reinforcement rib member is a solid rib member.

5. The aluminum alloy high-strength door sill beam according to claim 1, characterized in that: The through-column (201) and the docking cap (301) are detachably connected via a threaded connection.

6. The aluminum alloy high-strength door sill beam according to claim 1, characterized in that: The inner side walls of the first reinforcement shell (2) and the second reinforcement shell (3) are both provided with grooves matching the contour of the outer side wall of the beam body (1), and the depth of the grooves matches the thickness of the outer side wall of the beam body (1).

7. The aluminum alloy high-strength door sill beam according to claim 1, characterized in that: The vertical ribs (104), the oblique ribs (103), the first transverse ribs (101) and the second transverse ribs (102) are all integrally formed with the beam body (1) to form an internal reinforcing rib network structure.

8. The aluminum alloy high-strength door sill beam according to claim 1, characterized in that: The length of the through-column (201) is greater than the distance from the left outer side wall to the right outer side wall of the beam body (1), and the inner side of the docking cap (301) is provided with a limiting structure that cooperates with the end of the through-column (201).

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