Lightweight integrated aluminum alloy longitudinal beam structure for commercial vehicle

Abstract

The present application relates to a kind of lightweight integrated commercial vehicle aluminum alloy longitudinal beam structure, including front end casting, longitudinal beam body and rear end casting;Front end casting one end is connected with rear end casting by longitudinal beam body, and the other end of front end casting is connected with front wall assembly, and the other end of rear end casting is connected with rear wall assembly by longitudinal beam body with front end casting one end, and the upper end of front end casting, longitudinal beam body and rear end casting is connected with floor skin, and the lower end of front end casting and rear end casting is connected with suspension;Front end casting, longitudinal beam body and rear end casting are connected to realize integrated structure, reduce the number of parts in installation area, the single function of longitudinal beam and the problem of high welding precision, reduce weight, capital investment and production cost, improve production efficiency.

Description

Technical Field

[0001] This invention relates to the field of automotive parts technology, and in particular to a lightweight integrated aluminum alloy longitudinal beam structure for commercial vehicles. Background Technology

[0002] The longitudinal beams are the main load-bearing components of commercial vehicles. All chassis components are mounted on the longitudinal beams, and the cargo box or special equipment is placed directly on the longitudinal beams.

[0003] Existing longitudinal beams are usually made of high-strength steel by stamping. If components are to be installed, reinforcing plates and standard parts need to be welded inside the longitudinal beams to improve the local strength of the longitudinal beams. This results in a wide variety of components and increased capital investment. At the same time, the installation points of the components are distributed on different components, requiring high welding precision and making assembly difficult. In addition, the longitudinal beams have a relatively simple function as a carrier to connect the floor skin, front and rear panels and provide suspension. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a lightweight integrated aluminum alloy longitudinal beam structure for commercial vehicles. By connecting the front casting, the longitudinal beam body, and the rear casting to achieve an integrated structure, the number of parts in the installation area is reduced, and the problems of single function of the longitudinal beam and high welding precision are solved. This reduces weight, capital investment, and production costs, and improves production efficiency.

[0005] This invention is achieved using the following technical solution:

[0006] A lightweight integrated aluminum alloy longitudinal beam structure for commercial vehicles includes a front casting, a longitudinal beam body, and a rear casting. One end of the front casting is connected to the rear casting via the longitudinal beam body, and the other end of the front casting is connected to the front bulkhead assembly. One end of the rear casting is connected to the front casting via the longitudinal beam body, and the other end of the rear casting is connected to the rear bulkhead assembly. The upper ends of the front casting, longitudinal beam body, and rear casting are connected to the floor skin, and the lower ends of the front casting and rear casting are connected to the suspension.

[0007] Preferably, one end of the front casting is provided with a first connecting surface and a fourth connecting surface, the other end of the front casting is provided with a fifth connecting surface, and the upper end of the front casting is provided with a second connecting surface and a third connecting surface; the first connecting surface and the fourth connecting surface are respectively connected to the longitudinal beam body, the fifth connecting surface is connected to the front bulkhead assembly, the second connecting surface is connected to the floor panel by connecting bolts, and the third connecting surface is connected to the floor panel by SPR self-piercing riveting, rivet or spot welding.

[0008] Preferably, the fifth connecting surface is provided with a threaded hole, and the fifth connecting surface and the front bulkhead assembly are connected by a fixing bolt and the threaded hole.

[0009] Preferably, the longitudinal beam body has a sixth connecting surface at one end, a seventh connecting surface at the other end, and an eighth connecting surface at the upper end; the sixth connecting surface is connected to the first connecting surface by a blind rivet, and the sixth connecting surface is connected to the fourth connecting surface by CMT cold metal transition welding; the seventh connecting surface is connected to the rear casting; and the eighth connecting surface is connected to the floor covering.

[0010] Preferably, the connection method between the eighth connecting surface and the floor covering includes SPR self-piercing riveting, rivet riveting, or spot welding.

[0011] Preferably, one end of the rear casting is provided with a ninth connecting surface and a tenth connecting surface, the upper end of the rear casting is provided with an eleventh connecting surface, the ninth connecting surface is connected to the seventh connecting surface by a pop rivet, the tenth connecting surface is connected to the seventh connecting surface by CMT cold metal transition welding, the eleventh connecting surface is connected to the floor skin, and the other end of the rear casting is connected to the rear assembly.

[0012] Preferably, the connection method between the eleventh connecting surface and the floor covering includes SPR self-piercing riveting, rivet riveting, or spot welding.

[0013] Preferably, the front casting, the longitudinal beam body, and the rear casting are all made of aluminum alloy.

[0014] Preferably, the longitudinal beam body is provided with cross-shaped reinforcing ribs.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects:

[0016] 1. This invention achieves an integrated structure by connecting the front casting, the longitudinal beam body, and the rear casting, which reduces the number of components in the component installation area, solves problems such as the single function of the longitudinal beam and the high welding precision, reduces weight, capital investment and production costs, and improves production efficiency;

[0017] 2. The strength of the longitudinal beam body is enhanced by setting cross-shaped reinforcing ribs within the longitudinal beam body. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the exploded structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the connection structure between the front casting and the longitudinal beam body of the present invention;

[0020] Figure 3 This is a schematic diagram of the connection structure between the front casting and the floor skin of the present invention;

[0021] Figure 4 This is a cross-sectional schematic diagram of the longitudinal beam body of the present invention.

[0022] Attached image captions:

[0023] 1. Front casting; 11. First connecting surface; 12. Second connecting surface; 13. Third connecting surface; 14. Fourth connecting surface; 15. Fifth connecting surface; 2. Longitudinal beam body; 21. Sixth connecting surface; 22. Eighth connecting surface; 23. Seventh connecting surface; 3. Rear casting; 31. Ninth connecting surface; 32. Tenth connecting surface; 33. Eleventh connecting surface; 4. Blind rivet; 5. Connecting bolt; 6. Floor covering. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0025] like Figures 1-4 As shown, a lightweight integrated aluminum alloy longitudinal beam structure for commercial vehicles includes a front casting 1, a longitudinal beam body 2, and a rear casting 3. One end of the front casting 1 is connected to the rear casting 3 through the longitudinal beam body 2, and the other end of the front casting 1 is connected to the front bulkhead assembly. One end of the rear casting 3 is connected to the front casting 1 through the longitudinal beam body 2, and the other end of the rear casting 3 is connected to the rear bulkhead assembly. The upper ends of the front casting 1, the longitudinal beam body 2, and the rear casting 3 are connected to the floor skin 6, and the lower ends of the front casting 1 and the rear casting 3 are connected to the suspension.

[0026] One end of the front casting 1 is provided with a first connecting surface 11 and a fourth connecting surface 14, and the other end of the front casting 1 is provided with a fifth connecting surface 15. The upper end of the front casting 1 is provided with a second connecting surface 12 and a third connecting surface 13. The first connecting surface 11 and the fourth connecting surface 14 are respectively connected to the longitudinal beam body 2, the fifth connecting surface 15 is connected to the front bulkhead assembly, the second connecting surface 12 is connected to the floor skin 6 by connecting bolts 5, and the third connecting surface 13 is connected to the floor skin 6 by SPR self-piercing riveting, rivet or spot welding.

[0027] The front casting 1 adopts an integrated design with multiple connection surfaces, eliminating the need for additional reinforcing plates, mounting brackets, or other components. It can reliably connect with the front suspension, floor skin 6, and front bulkhead assembly.

[0028] The fifth connecting surface 15 is provided with a threaded hole, and the fifth connecting surface 15 is connected to the front bulkhead assembly by fixing bolts and threaded holes.

[0029] The longitudinal beam body 2 has a sixth connecting surface 21 at one end, a seventh connecting surface 23 at the other end, and an eighth connecting surface 22 at the upper end. The sixth connecting surface 21 is connected to the first connecting surface 11 by a pop rivet 4, and the sixth connecting surface 21 is connected to the fourth connecting surface 14 by CMT cold metal transition welding. The seventh connecting surface 23 is connected to the rear casting 3, and the eighth connecting surface 22 is connected to the floor covering 6.

[0030] The connection methods between the eighth connecting surface 22 and the floor covering 6 include SPR self-piercing riveting, rivet riveting, or spot welding.

[0031] One end of the rear casting 3 is provided with a ninth connecting surface 31 and a tenth connecting surface 32, and the upper end of the rear casting 3 is provided with an eleventh connecting surface 33. The ninth connecting surface 31 and the seventh connecting surface 23 are connected by a core-pulling rivet 4, and the tenth connecting surface 32 and the seventh connecting surface 23 are connected by CMT cold metal transition welding. The eleventh connecting surface 33 is connected to the floor skin 6, and the other end of the rear casting 3 is connected to the rear assembly.

[0032] The rear casting 3 adopts an integrated design with multiple connection surfaces, allowing for reliable connection with the rear suspension, floor skin 6, and rear bulkhead assembly without the need for additional reinforcing plates, mounting brackets, or other components.

[0033] The connection methods between the eleventh connecting surface 33 and the floor covering 6 include SPR self-piercing riveting, riveting, or spot welding. The floor covering 6 can freely switch between SPR self-piercing riveting, riveting, or spot welding depending on the different floor covering materials.

[0034] The front casting 1, the longitudinal beam body 2, and the rear casting 3 are all made of aluminum alloy.

[0035] The longitudinal beam body 2 adopts an aluminum alloy profile structure, which can be flexibly changed to different thicknesses according to performance requirements to achieve the optimal balance between weight and performance; the front casting 1 and the rear casting 3 are both made of aluminum alloy and are connected to the longitudinal beam body 2 to achieve an integrated structure.

[0036] The longitudinal beam body 2 is equipped with cross-shaped reinforcing ribs. The cross-shaped reinforcing ribs inside the longitudinal beam body 2 enhance the strength of the longitudinal beam body 2 and improve the overall rigidity of the longitudinal beam structure.

Claims

1. A lightweight integrated aluminum alloy longitudinal beam structure for commercial vehicles, characterized in that, It includes a front casting (1), a longitudinal beam body (2), and a rear casting (3); one end of the front casting (1) is connected to the rear casting (3) through the longitudinal beam body (2), and the other end of the front casting (1) is connected to the front assembly; one end of the rear casting (3) is connected to the front casting (1) through the longitudinal beam body (2), and the other end of the rear casting (3) is connected to the rear assembly; the upper ends of the front casting (1), the longitudinal beam body (2), and the rear casting (3) are connected to the floor covering (6), and the lower ends of the front casting (1) and the rear casting (3) are connected to the suspension. The front casting (1) has a first connecting surface (11) and a fourth connecting surface (14) at one end, a fifth connecting surface (15) at the other end, and a second connecting surface (12) and a third connecting surface (13) at the upper end of the front casting (1). The first connecting surface (11) and the fourth connecting surface (14) are respectively connected to the longitudinal beam body (2), the fifth connecting surface (15) is connected to the front bulkhead assembly, the second connecting surface (12) is connected to the floor skin (6) by connecting bolts (5), and the third connecting surface (13) is connected to the floor skin (6) by SPR self-piercing riveting, rivet or spot welding. The longitudinal beam body (2) has a sixth connecting surface (21) at one end, a seventh connecting surface (23) at the other end, and an eighth connecting surface (22) at the upper end. The sixth connecting surface (21) is connected to the first connecting surface (11) by a blind rivet (4), and the sixth connecting surface (21) is connected to the fourth connecting surface (14) by CMT cold metal transition welding. The seventh connecting surface (23) is connected to the rear casting (3), and the eighth connecting surface (22) is connected to the floor covering (6). The rear casting (3) has a ninth connecting surface (31) and a tenth connecting surface (32) at one end, and an eleventh connecting surface (33) at the upper end. The ninth connecting surface (31) and the seventh connecting surface (23) are connected by a blind rivet (4). The tenth connecting surface (32) and the seventh connecting surface (23) are connected by CMT cold metal transition welding. The eleventh connecting surface (33) is connected to the floor skin (6). The other end of the rear casting (3) is connected to the rear assembly.

2. The lightweight integrated commercial vehicle aluminum alloy longitudinal beam structure according to claim 1, characterized in that, The fifth connecting surface (15) is provided with a threaded hole, and the fifth connecting surface (15) and the front bulkhead assembly are connected by fixing bolts and threaded holes.

3. The lightweight integrated commercial vehicle aluminum alloy longitudinal beam structure according to claim 1, characterized in that, The connection methods between the eighth connecting surface (22) and the floor covering (6) include SPR self-piercing riveting, rivet or spot welding.

4. The lightweight integrated commercial vehicle aluminum alloy longitudinal beam structure according to claim 1, characterized in that, The connection methods between the eleventh connecting surface (33) and the floor covering (6) include SPR self-piercing riveting, rivet or spot welding.

5. The lightweight integrated commercial vehicle aluminum alloy longitudinal beam structure according to claim 1, characterized in that, The front casting (1), the longitudinal beam body (2), and the rear casting (3) are all made of aluminum alloy.

6. The lightweight integrated commercial vehicle aluminum alloy longitudinal beam structure according to claim 5, characterized in that, The longitudinal beam body (2) is provided with cross-shaped reinforcing ribs.

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