A kind of truck assembly type aluminum alloy side anti-collision beam assembly

Abstract

A kind of truck is assembled aluminum alloy side anti-collision beam assembly, side anti-collision beam body is the cavity structure of "day" character, cavity is designed with T groove and screw groove, connecting rod lower end is connected with the T block embedded in T groove, and the upper end of connecting rod is connected with mounting plate;Side anti-collision beam body left end is sealed with first sealing plate, and right end is connected with elbow.The utility model discloses through full no-welding system, T groove dynamic bearing system and extrusion full adaptation design, the side anti-collision beam assembly is connected with full bolt, can eliminate the brittle risk of welding heat affected zone, realizes component level quick replacement;Connecting rod and side anti-collision beam body large-area adhesion, avoid stress concentration in bolt connection point when low-speed collision;T groove structure avoids the weakening of traditional bolt connection to side anti-collision beam body drilling, maintains the integrity of main structure;Mounting plate L type edge covering structure makes connection more stable and reliable;Assembly is obtained by extrusion forming + simple machining production from aluminum alloy, has good corrosion resistance, and overall quality is light.

Description

Technical Field

[0001] The present utility model relates to the technical field of vehicles, in particular to a fabricated aluminum alloy side anti-collision beam assembly for freight vehicles. Background Art

[0002] At present, aluminum alloy has been widely used to replace traditional steel in the field of side anti-collision beams for freight vehicles, mainly pursuing the dual advantages of light weight and corrosion resistance. Existing technologies show that 6000 series aluminum alloys (such as Al-Mg-Si alloys) have become the mainstream material choice for anti-collision beams due to their excellent extrusion forming performance and strength-to-weight ratio. After aging treatment, the yield strength of this material can reach more than 250MPa, while maintaining a low density of about 2.7g / cm³, achieving a weight reduction of 30%-40% compared with steel. In terms of structural design, multi-cavity extruded profiles have become a key approach to improve the performance of aluminum alloy anti-collision beams. For example, the "H"-shaped or "field"-shaped cross-section is divided into a plurality of energy-absorbing chambers by internal ribs, which absorb impact energy through orderly crushing during a collision.

[0003] In terms of connection methods in the prior art, the traditional welding process is still dominant, but it has exposed significant defects: 1. The heat-affected zone (HAZ) of welding will cause coarsening of aluminum alloy grains and dissolution of precipitated phases, reducing the joint strength by about 30%; 2. Welding is non-detachable, requiring replacement of the entire assembly during maintenance, which increases the use cost; 3. Welding has a high hazard level and easily causes various occupational diseases, such as welder's pneumoconiosis, manganese poisoning, and electric ophthalmia. To address this problem, some patents have begun to explore alternative "bolting connection" solutions. Although these solutions avoid welding defects, they have not yet solved the problem of local stress concentration - crack propagation is prone to occur around the bolt holes, leading to connection failure.

[0004] For example, the existing patents CN201910203894.7 (A Side Protection Device for Freight Vehicles and Its Automatic Adjustment Method) and CN202110481511.X (An Impact-Resistant Aluminum Alloy Side Protection Device for Freight Vehicles) are both highly adjustable to adapt to different vehicle types, but their adjustment mechanisms are complex and prone to loosening under dynamic impact; the existing patent such as US17369076 is an anti-under-ride structure composed of longitudinal main beams and cross braces, which can prevent small vehicles from underriding the freight vehicle, but it adopts a steel-aluminum hybrid structure with relatively large weight and a low proportion of aluminum alloy.

[0005] In summary, the current technology of side anti-collision beams for freight vehicles has the following problems: 1. Irreversible welding defect: the contradiction between the performance degradation of the heat-affected zone (HAZ) of welding and maintenance economy; 2. Single force transmission path: the bolted connection will cause collision stress to concentrate on the connection point, which easily leads to unexpected deformation. Summary of the Invention

[0006] In view of the above problems, the present utility model provides a prefabricated aluminum alloy side anti-collision beam assembly for trucks. Through the full non-welding system, T-slot dynamic load-bearing system and full-adaptation extrusion design, the side anti-collision beam assembly is connected by full bolts, which can eliminate the embrittlement risk of the heat-affected zone (HAZ) caused by welding and realize rapid component-level replacement. The connecting rod is in large-area fit with the side anti-collision beam body, providing a uniform force-bearing platform for the bolts during medium and low-speed collisions, so as to avoid stress concentration at the bolt connection points during collision. The T-slot structure avoids the drilling weakening of the side anti-collision beam body caused by the traditional bolt connection, and maintains the integrity of the main structure. The L-shaped edge-wrapping structure of the mounting plate significantly suppresses the torsional vibration during collision by restricting two degrees of freedom of the connecting rod, making the connection more stable and reliable. The entire assembly is produced by aluminum alloy extrusion forming plus simple machining, which has good corrosion resistance and light overall weight.

[0007] To achieve the above purpose, the technical solution of the present utility model is as follows:

[0008] A prefabricated aluminum alloy side anti-collision beam assembly for trucks mainly includes a side anti-collision beam body, a connecting rod, a mounting plate, an elbow, a T-shaped block, a first sealing plate and a second sealing plate. The side anti-collision beam body is a "day"-shaped cavity structure, a T-slot is designed on the right side of the cavity, screw slots are designed on the inner walls of the upper and lower surfaces of the cavity, and the T-shaped block is embedded in the T-slot. The lower end of the connecting rod is connected with the T-shaped block in the T-slot through a bolt B and is fitted with the side surface of the side anti-collision beam body, and the upper end of the connecting rod is connected with the mounting plate through a bolt A. The left end of the side anti-collision beam body is sealed with the first sealing plate, and the first sealing plate is fixed by screwing the bolt B into the screw slot of the side anti-collision beam body. The right end of the side anti-collision beam body is connected with the elbow, and the elbow is fixed by a bolt C.

[0009] The side anti-collision beam assembly adopts full bolt connection (no welding), which can completely eliminate the irreversible defects of welding, avoid the embrittlement risk of the welding heat-affected zone (HAZ), and greatly improve the connection strength compared with welding. At the same time, it solves the problem that the assembly is non-detachable, enables rapid component-level replacement during maintenance without replacing the entire assembly, and reduces the life cycle cost.

[0010] The side anti-collision beam body is a "day"-shaped cavity structure, which is divided into two energy-absorbing chambers by internal ribs, and can be crushed in an orderly manner to absorb impact energy during collision.

[0011] The side anti-collision beam body is designed with a T-slot structure, in which a T-shaped block can be embedded, and a threaded hole is machined on the T-shaped block. The modular design of the T-slot makes the installation, disassembly and position adjustment of the connecting rod convenient and fast. At the same time, the T-slot structure avoids the drilling weakening of the side anti-collision beam body caused by the traditional bolt connection, maintains the integrity of the main structure, and strengthens the structural strength of the side anti-collision beam body.

[0012] The connecting rod is square and hollow, with bolt through holes at both the top and bottom. The side impact beam body fits closely to the connecting rod over a large area, allowing for uniform stress distribution. Combined with the omnidirectional bending resistance of the square hollow tube, the stress on the bolts is greatly reduced.

[0013] The mounting plate features weight-reduction holes, an L-shaped edging structure, and several bolt through holes; the upper L-shaped edging of the mounting plate has a semi-circular notch. The rectangular weight-reduction holes reduce the mass by approximately 10%, while the L-shaped edging structure significantly suppresses torsional vibration during collisions by constraining the two degrees of freedom of the connecting rod; the circular notch design cleverly solves the problem of vehicle body manufacturing tolerances, making the connection between the mounting plate and the circular parts of the vehicle body more stable and reliable.

[0014] The elbow is a double-cavity arc-shaped structure, with screw grooves and reinforcing ribs inside the cavities. The left side of the elbow extends forward and backward to wrap around the side impact beam, and the top and bottom are sealed with a second sealing plate, which is fixed by bolt B screwed into the screw groove of the elbow. The elbow's double-cavity design provides structural strength and collision energy absorption, preventing a direct impact force when the truck hits an object, and thus offering some protection to the side impact beam.

[0015] The side impact beam body, connecting rod, mounting plate, elbow, T-block, and sealing plate can all be obtained by aluminum alloy extrusion molding followed by simple machining. It has good corrosion resistance, light overall weight, and low manufacturing cost.

[0016] Advantages of utility models:

[0017] 1. The side impact beam assembly of this utility model adopts a full bolt connection (no welding), which can eliminate the irreversible defects of welding, eliminate the risk of HAZ embrittlement, and significantly improve the connection strength compared with welding. At the same time, it solves the problem of the assembly being non-removable, and can achieve rapid component-level replacement during maintenance without replacing the entire assembly, thus reducing life cycle costs.

[0018] 2. The connecting rod of this utility model fits closely to the side impact beam body over a large area, providing a uniform force-bearing platform for the bolts during low-to-medium speed collisions, thus dispersing the collision stress evenly. Combined with the omnidirectional bending resistance of the square hollow tube, the bolt stress is reduced by more than 60%. This not only provides a certain degree of protection for key components such as the fuel tank, but also alleviates the casualties caused by collisions between small vehicles and trucks to a certain extent.

[0019] 3. The side impact beam body of this utility model is designed with a T-slot structure, which makes it convenient and quick to install, disassemble and adjust the position of each component of the side impact beam assembly; at the same time, the T-slot structure avoids the weakening of the side impact beam body by drilling due to traditional bolt connection, maintains the integrity of the main structure and strengthens the structural strength of the side impact beam body.

[0020] 4. The rectangular weight-reducing holes of the mounting plate of this utility model reduce the mass by 10%, and the L-shaped edge structure significantly suppresses torsional vibration during collision by constraining the two degrees of freedom of the connecting rod; the circular notch design makes the connection between the mounting plate and the circular parts of the vehicle body more stable and reliable.

[0021] 5. The design of the bend in this utility model has a certain structural strength and collision energy absorption function, which can prevent the truck from generating a positive impact force when it hits something, and play a certain role in protecting the side anti-collision beam.

[0022] 6. All components of the side impact beam assembly of this utility model can be obtained by aluminum alloy extrusion molding followed by simple machining, resulting in good corrosion resistance, light overall weight, and low manufacturing cost. Attached Figure Description

[0023] Figure 1 This is an overall elevation view of the side impact beam of this utility model;

[0024] Figure 2 This is a front view of the side impact beam assembly of this utility model;

[0025] Figure 3 for Figure 1 Enlarged structural diagram at point I;

[0026] Figure 4 for Figure 1 Enlarged structural diagram at point II;

[0027] Figure 5 for Figure 2 Cross-sectional view along the AA direction;

[0028] Figure 6 This is a cross-sectional view of the side impact beam body of this utility model;

[0029] Figure 7 This is an elevation view of the mounting plate structure of this utility model;

[0030] Figure 8 This is an elevation view of the elbow structure of this utility model;

[0031] Figure 9 This is an elevation view of the T-shaped block structure of this utility model;

[0032] The numbers and component names in the diagram are as follows: 1-Side anti-collision beam body; 11-T-slot; 12-Screw slot; 2-Connecting rod; 3-Mounting plate; 31-Bolt through hole; 32-Weight reduction hole; 4-Elbow; 5-T-block; 51-Threaded hole; 6-First sealing plate; 7-Second sealing plate; 8-Bolt A; 9-Bolt B; 10-Bolt C. Detailed Implementation

[0033] Example 1

[0034] An assembled aluminum alloy side anti-collision beam assembly for freight vehicles, mainly comprising a side anti-collision beam body 1, a connecting rod 2, a mounting plate 3, an elbow 4, a T-shaped block 5, a first sealing plate 6, and a second sealing plate 7; the side anti-collision beam body 1 is of a "day"-shaped cavity structure, a T-shaped groove 11 is arranged on the right side surface of the cavity, screw grooves 12 are arranged on the inner walls of the upper and lower surfaces of the cavity, and the T-shaped block 5 is embedded in the T-shaped groove 11; the lower end of the connecting rod 2 is connected with the T-shaped block 5 in the T-shaped groove 11 through a bolt B9 and fits against the side surface of the side anti-collision beam body 1, and the upper end of the connecting rod 2 is connected with the mounting plate 3 through a bolt A8; the left end of the side anti-collision beam body 1 is sealed with the first sealing plate 6, and the first sealing plate 6 is fixed by screwing the bolt B9 into the screw groove 12 of the side anti-collision beam body 1; the right end of the side anti-collision beam body 1 is connected with the elbow 4, and the elbow 4 is fixed by a bolt C10.

[0035] The connecting rod 2 is square and hollow, and is provided with bolt through holes at both the upper and lower ends.

[0036] The mounting plate 3 is provided with lightening holes 32, an L-shaped edge-wrapping structure and a plurality of bolt through holes 31; a semicircular notch is formed on the L-shaped edge-wrapping at the upper end of the mounting plate 3.

[0037] The elbow 4 is of a double-cavity arc structure, and screw grooves 12 and reinforcing ribs are arranged in the cavities; the front and rear surfaces of the left side of the elbow 4 extend to wrap the side anti-collision beam body 1, the upper and lower surfaces are sealed with the second sealing plate 7, and the second sealing plate 7 is fixed by screwing the bolt B9 into the screw groove 12 of the elbow 4.

[0038] The T-shaped groove 11 is fitted with the T-shaped block 5, and threaded holes 51 are arranged on the T-shaped block 5.

Claims

1. A prefabricated aluminum alloy side impact beam assembly for trucks, characterized in that: Mainly includes a side anti-collision beam body (1), a connecting rod (2), a mounting plate (3), an elbow (4), a T-shaped block (5), a first sealing plate (6), and a second sealing plate (7); the side anti-collision beam body (1) is a "day"-shaped cavity structure, the right side surface of the cavity is provided with a T-shaped groove (11), the inner walls of the upper and lower surfaces of the cavity are provided with screw grooves (12), and the T-shaped block (5) is embedded in the T-shaped groove (11); the lower end of the connecting rod (2) is connected to the T-shaped block (5) in the T-shaped groove (11) through a bolt B (9) and fits against the side surface of the side anti-collision beam body (1), and the upper end of the connecting rod (2) is connected to the mounting plate (3) through a bolt A (8); the left end of the side anti-collision beam body (1) is sealed with the first sealing plate (6), and the first sealing plate (6) is fixed by screwing the bolt B (9) into the screw groove (12) of the side anti-collision beam body (1); the right end of the side anti-collision beam body (1) is connected with the elbow (4), and the elbow (4) is fixed by a bolt C (10).

2. The prefabricated aluminum alloy side impact beam assembly for trucks according to claim 1, characterized in that: The connecting rod (2) is square and hollow, and both the upper and lower ends are provided with bolt through holes.

3. The prefabricated aluminum alloy side impact beam assembly for trucks according to claim 1, characterized in that: The mounting plate (3) is provided with a weight-reducing hole (32), an L-shaped edge-wrapping structure and a plurality of bolt through holes (31); the L-shaped edge-wrapping at the upper end of the mounting plate (3) is provided with a semicircular notch.

4. The prefabricated aluminum alloy side impact beam assembly for trucks according to claim 1, characterized in that: The elbow (4) is a double-cavity arc structure, and screw grooves (12) and reinforcing ribs are arranged in the cavity; the front and rear surfaces on the left side of the elbow (4) extend to wrap the side anti-collision beam body (1), the upper and lower surfaces are sealed with the second sealing plate (7), and the second sealing plate (7) is fixed by screwing the bolt B (9) into the screw groove (12) of the elbow (4).

5. The prefabricated aluminum alloy side impact beam assembly for trucks according to claim 1, characterized in that: The T-shaped groove (11) is fitted with the T-shaped block (5), and threaded holes (51) are arranged on the T-shaped block (5).

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