A light commercial vehicle frame

Abstract

The utility model discloses a light commercial vehicle frame, including two groups of longitudinal beam assembly and the crossbeam assembly between them. Two groups of longitudinal beam assembly symmetrical setting, its all contain front section beam, front connecting beam assembly, middle section beam, rear connecting beam assembly, rear section beam, first and second fastening bolt. Front section beam, middle section beam, rear section beam are aluminum profile straight beam, and front, rear connecting beam assembly is steel quality. The front connecting beam assembly is curved in the form of outward expansion, and the front and rear ends are provided with notches, the rear end of the front section beam and the front end of the middle section beam are respectively inserted into the front and rear end notches of the front connecting beam assembly and are fixed through corresponding bolts. The rear connecting beam assembly is the same as the front connecting beam assembly in structure and is symmetrically arranged at the two ends of the middle section beam. Through the above setting, the whole vehicle frame uses steel-aluminum mixed material, the steel material is selected at the positions of the front and rear connecting beam assemblies where the stress is relatively concentrated, and each component of the longitudinal beam assembly is connected through screwing, replacing the traditional welding mode, ensuring the structural stability and improving the assembly efficiency.

Description

Technical Field

[0001] This utility model relates to the field of new energy vehicle technology, specifically to a light commercial vehicle frame. Background Technology

[0002] China's "Limits for Fuel Consumption of Light Commercial Vehicles" requires a 15% reduction in overall vehicle energy consumption by 2025 compared to 2020, directly driving up the penetration rate of steel-aluminum hybrid vehicle frames. Through the synergistic design of high-strength steel and aluminum alloys, steel-aluminum hybrid vehicle frames achieve a 20%-30% weight reduction while maintaining load-bearing capacity.

[0003] Utility model patent CN220884549U discloses a modular chassis for electric light commercial vehicles, in which the longitudinal beams of each module are connected by lap welding. This structure has the following shortcomings: stress concentration is easily formed at the welded joints due to structural abrupt changes, which can easily lead to fatigue cracks under long-term vibration and impact loads, resulting in a decrease in structural durability; the welding connection method affects the modular assembly efficiency and has strict requirements for assembly precision, and improper control of welding deformation can easily affect the installation of subsequent components; disassembly during maintenance is cumbersome, requiring cutting and re-welding, which is not only time-consuming and labor-intensive, but may also damage the original structural strength. Utility Model Content

[0004] In view of this, this utility model discloses a lightweight commercial vehicle frame, the specific solution of which is as follows:

[0005] A light commercial vehicle frame includes two sets of longitudinal beam assemblies and a crossbeam assembly disposed between the two sets of longitudinal beam assemblies;

[0006] The two sets of longitudinal beam assemblies are identical in structure and symmetrically arranged, each including a front beam, a front connecting beam assembly, a middle beam, a rear connecting beam assembly, a rear beam, a first fastening bolt, and a second fastening bolt. The front, middle, and rear beams are all made of aluminum alloy and are all straight beam structures. The front and middle beams are connected by the front connecting beam assembly, and the middle and rear beams are connected by the rear connecting beam assembly. Both the front and rear connecting beam assemblies are made of steel.

[0007] The front connecting beam assembly has an outwardly flared curved structure, with its rear end extending outward relative to the front end, making the distance between the front ends of the two front connecting beam assemblies on the two sets of longitudinal beam assemblies smaller than the distance between their rear ends. The front and rear ends of the front connecting beam assembly are provided with slots. The rear end of the front beam is inserted into the slot at the front end of the front connecting beam assembly and fixedly connected to the front connecting beam assembly by a first fastening bolt. The front end of the middle beam is inserted into the slot at the rear end of the front connecting beam assembly and fixedly connected to the front connecting beam assembly by a second fastening bolt. The rear connecting beam assembly has the same structure as the front connecting beam assembly and is symmetrically arranged at both ends of the middle beam.

[0008] As a supplement to the technical solution of this utility model, the front connecting beam assembly includes an inner plate and an outer plate of the connecting beam, both of which have U-shaped cross-sections. The U-shaped openings of the inner plate and the outer plate are arranged opposite to each other and interlocked to form a square slot structure. The upper top wall of the outer plate is located above the upper top wall of the inner plate, and the lower bottom wall of the outer plate is located above the lower bottom wall of the inner plate.

[0009] The upper top wall of the front and rear of the inner plate of the connecting beam is provided with a limiting notch, and the lower bottom wall of the front and rear of the outer plate of the connecting beam is provided with a limiting notch. The ends of the front / middle beam are located within the square groove structure enclosed by the inner and outer plates of the connecting beam. The upper top wall of the front / middle beam contacts the upper top wall of the outer plate of the connecting beam and is riveted together. The lower bottom wall of the front / middle beam contacts the lower bottom wall of the inner plate of the connecting beam and is riveted together.

[0010] As a supplement to the technical solution of this utility model, the first fastening bolt passes through the outer plate of the connecting beam, the outer side wall of the front beam, the inner side wall of the front beam, and the side wall of the inner plate of the connecting beam in sequence, connecting the front connecting beam assembly to the front beam.

[0011] As a supplement to the technical solution of this utility model, a battery tray is also included. The battery tray is disposed between the two sets of longitudinal beam assemblies, and the two ends of the battery tray are connected to the middle section beams of the two sets of longitudinal beam assemblies respectively.

[0012] As a supplement to the technical solution of this utility model, it also includes a first crossbeam assembly and a second crossbeam assembly;

[0013] The first crossbeam assembly includes a first crossbeam and a first crossbeam connector. The first crossbeam is connected to the front beam through the first crossbeam connector. The side surface of the first crossbeam connector has a slot for inserting the first crossbeam. The end of the first crossbeam is inserted into the slot on the side surface of the first crossbeam connector and screwed into the first crossbeam connector. The upper part of the first crossbeam connector has an upward-opening U-shaped groove. The first crossbeam connector is inserted into the front beam through the U-shaped groove and connected to the first crossbeam connector by screwing.

[0014] The second crossbeam assembly includes a second crossbeam and a second crossbeam connector. The second crossbeam is connected to the front connecting beam assembly via the second crossbeam connector. The side surface of the second crossbeam connector has a slot for inserting the second crossbeam. The end of the second crossbeam is inserted into the slot on the side surface of the second crossbeam connector and screwed into the second crossbeam connector. The upper top wall of the second crossbeam connector is welded to the lower bottom wall of the front connecting beam assembly. The upper top wall of the second crossbeam connector has a connector protrusion extending toward the side wall of the front connecting beam assembly. The connector protrusion is welded to the side wall of the front connecting beam assembly.

[0015] The first crossbeam connector is made of aluminum alloy, the second crossbeam connector is made of steel, and both the first and second crossbeams are made of aluminum alloy.

[0016] As a supplement to the technical solution of this utility model, it also includes a front shock absorber tower assembly, which includes a shock absorber column;

[0017] The shock-absorbing column is located above the connection point between the front section beam and the front connecting beam assembly. The lower part of the shock-absorbing column has a U-shaped groove. The shock-absorbing column is inserted into the front part of the front connecting beam assembly through its U-shaped groove. The first fastening bolt passes through the side wall of the shock-absorbing column, the outer plate of the connecting beam, the front section beam, and the inner plate of the connecting beam, and fixes the shock-absorbing column, the front connecting beam assembly, and the front section beam in place.

[0018] The upper fork of the chassis is located at the upper end of the shock-absorbing column;

[0019] The lower control arm of the chassis has a Y-shaped structure, with a front branch link and a rear branch link at the front. The first crossbeam connector has a slot for inserting the front branch link of the lower control arm. The front branch link is inserted into the slot on the first crossbeam connector and is hinged to the first crossbeam connector. The second crossbeam connector has a slot for inserting the rear branch link of the lower control arm. The rear branch link is inserted into the slot on the second crossbeam connector and is hinged to the second crossbeam connector.

[0020] As a supplement to the technical solution of this utility model, the crossbeam assembly also includes a third crossbeam assembly, a fourth crossbeam, and a fifth crossbeam. The third crossbeam assembly is disposed between the rear connecting beam assemblies of the two sets of longitudinal beam assemblies and includes a third crossbeam and a third crossbeam connector. The third crossbeam is connected to the rear connecting beam assembly through the third crossbeam connector.

[0021] The fourth crossbeam is located in front of the fifth crossbeam, and both the fourth and fifth crossbeams are located between the rear beam assemblies of the two sets of longitudinal beam assemblies; the third crossbeam connector is made of steel, and the third, fourth, and fifth crossbeams are all made of aluminum alloy.

[0022] As a supplement to the technical solution of this utility model, it also includes a front anti-collision beam assembly and a rear anti-collision beam assembly. The front anti-collision beam assembly is disposed at the front end of the two sets of longitudinal beam assemblies, and the rear anti-collision beam assembly is disposed at the rear end of the two sets of longitudinal beam assemblies.

[0023] Beneficial effects: The lightweight commercial vehicle frame disclosed in this utility model has the following advantages:

[0024] 1. The front and rear connecting beam assemblies are made of steel, which has high tensile strength and excellent impact resistance. This ensures the overall structural strength in key areas where stress is concentrated and improves the durability of the frame under complex working conditions.

[0025] 2. Abandoning traditional welding methods, the structural design of the front and rear connecting beam assemblies is improved by using bolted structures such as first and second fastening bolts to connect them to the front, middle, and rear beams. This avoids stress concentration problems caused by structural abrupt changes at welded joints, reduces the risk of fatigue cracks under long-term vibration and impact loads, and improves structural durability.

[0026] 3. The front connecting beam assembly has an outward-expanding curved structure, and the rear connecting beam assembly is symmetrically arranged, so that the two sets of longitudinal beam assemblies have a shape that is narrow at both ends and wide in the middle in the width direction of the frame. This adapts to the installation requirements of the chassis suspension and provides sufficient space for the placement of power batteries such as skateboard batteries, solving the problem that the traditional ladder-shaped frame cannot meet the battery placement requirements. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0028] Figure 2 This is a top view of the structure of this utility model.

[0029] Figure 3 This is a schematic diagram of the front connecting beam assembly of this utility model.

[0030] Figure 4 This is a cross-sectional structural diagram of the connection between the front connecting beam assembly, the first crossbeam connector, and the front beam section of this utility model.

[0031] Figure 5 This is a schematic diagram of the connection structure between the first crossbeam assembly and the front beam of this utility model.

[0032] Figure 6 This is a schematic diagram of the connection structure between the second crossbeam assembly and the front connecting beam assembly of this utility model.

[0033] Figure 7 for Figure 1 Enlarged schematic diagram of the structure at point A in the middle.

[0034] In the diagram: 1. Front beam, 2. Front connecting beam assembly, 3. Middle beam, 4. Rear connecting beam assembly, 5. Rear beam, 6. First fastening bolt, 7. Inner plate of connecting beam, 8. Outer plate of connecting beam, 9. Battery tray, 10. First crossbeam assembly, 11. Second crossbeam assembly, 12. First crossbeam, 13. First crossbeam connector, 14. Second crossbeam, 15. Second crossbeam connector, 16. Front shock absorber tower assembly, 17. Upper fork arm, 18. Shock absorber column, 19. Front branch link, 20. Rear branch link, 21. Third crossbeam assembly, 22. Fourth crossbeam, 23. Fifth crossbeam, 24. Front anti-collision beam assembly, 25. Rear anti-collision beam assembly, 26. Longitudinal beam assembly, 27. Connector protrusion, 28. Lower fork arm. Detailed Implementation

[0035] In the description of this utility model, it should be understood that 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 indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] like Figures 1 to 7 As shown, a light commercial vehicle frame includes two sets of longitudinal beam assemblies 26 and a crossbeam assembly disposed between the two sets of longitudinal beam assemblies 26. The two sets of longitudinal beam assemblies 26 have the same structure and are symmetrically arranged. Each set includes a front beam 1, a front connecting beam assembly 2, a middle beam 3, a rear connecting beam assembly 4, a rear beam 5, a first fastening bolt 6, and a second fastening bolt.

[0038] The front beam 1, middle beam 3, and rear beam 5 are all made of aluminum alloy and are all straight beam structures. The front beam 1 and middle beam 3 are connected by a front connecting beam assembly 2, and the middle beam 3 and rear beam 5 are connected by a rear connecting beam assembly 4. Both the front connecting beam assembly 2 and the rear connecting beam assembly 4 are made of steel.

[0039] The front connecting beam assembly 2 has an outwardly flared curved structure, with its rear end extending outward relative to the front end, making the distance between the front ends of the two front connecting beam assemblies 2 on the two sets of longitudinal beam assemblies 26 smaller than the distance between their rear ends. Both the front and rear ends of the front connecting beam assembly 2 are provided with slots. The rear end of the front section beam 1 is inserted into the slot at the front end of the front connecting beam assembly 2 and fixedly connected to the front connecting beam assembly 2 by the first fastening bolt 6; the front end of the middle section beam 3 is inserted into the slot at the rear end of the front connecting beam assembly 2 and fixedly connected to the front connecting beam assembly 2 by the second fastening bolt.

[0040] The rear connecting beam assembly 4 has the same structure as the front connecting beam assembly 2 and is symmetrically arranged at both ends of the middle beam 3.

[0041] Through the above configuration, the longitudinal beams of the frame are constructed by splicing steel and aluminum alloy beams. By using steel front connecting beam assembly 2 and rear connecting beam assembly 4 in critical areas with concentrated stress, the high tensile strength and excellent impact resistance of steel can be fully utilized to ensure the overall structural strength of the frame under complex working conditions. Simultaneously, the front connecting beam assembly 2 and rear connecting beam assembly 4 are connected to the aluminum alloy front beam 1, middle beam 3, and rear beam 5 via bolted connections, replacing the traditional welding method. This significantly improves assembly accuracy and connection efficiency while ensuring connection strength. Furthermore, the modular connection structure facilitates disassembly and replacement.

[0042] As a preferred technical solution of this utility model, the front connecting beam assembly 2 includes an inner connecting beam plate 7 and an outer connecting beam plate 8. The inner connecting beam plate 7 and the outer connecting beam plate 8 both have U-shaped cross-sections. The U-shaped openings of the inner connecting beam plate 7 and the outer connecting beam plate 8 are interlocked in opposite directions to form a square slot structure, such that the upper top wall of the outer connecting beam plate 8 is above the upper top wall of the inner connecting beam plate 7, and the lower bottom wall of the outer connecting beam plate 8 is above the lower bottom wall of the inner connecting beam plate 7.

[0043] The upper top walls of the front and rear parts of the inner plate 7 of the connecting beam are provided with limiting notches, and the lower bottom walls of the front and rear parts of the outer plate 8 of the connecting beam are provided with limiting notches. When the front section beam 1 / middle section beam 3 is inserted into the square groove structure enclosed by the inner plate 7 and the outer plate 8 of the connecting beam, the upper top wall of the front section beam 1 / middle section beam 3 contacts the upper top wall of the outer plate 8 of the connecting beam and is riveted together, and the lower bottom wall of the front section beam 1 / middle section beam 3 contacts the lower bottom wall of the inner plate 7 of the connecting beam and is riveted together.

[0044] Preferably, the inner plate 7 and the outer plate 8 of the connecting beam are welded together.

[0045] As a preferred embodiment of this utility model, the first fastening bolt 6 passes sequentially through the outer plate 8 of the connecting beam, the outer sidewall of the front beam 1, the inner sidewall of the front beam 1, and the sidewall of the inner plate 7 of the connecting beam, connecting the front connecting beam assembly 2 to the front beam 1. The outer sidewall of the front beam 1 is the sidewall of the front beam 1 away from the center of the frame, and the inner sidewall of the front beam 1 is the sidewall of the front beam 1 closer to the center of the frame.

[0046] The structure and method of connecting the rear connecting beam with the middle section beam 3 and the rear section beam 5 are the same as the structure and method of connecting the front connecting beam with the front section beam 1 and the middle section beam 3.

[0047] As a preferred embodiment of this utility model, it also includes a battery tray 9, which is disposed between two sets of longitudinal beam assemblies 26, and the two ends of the battery tray 9 are connected to the middle sections 3 of the two sets of longitudinal beam assemblies 26 respectively. Through the structural design of the front connecting beam assembly 2 and the rear connecting beam assembly 4, the distance between the two sets of middle sections 3 is greater than the distance between the two sets of front sections 1 and the distance between the two sets of rear sections 5, so that the span of the two sets of longitudinal beam assemblies 26 in the width direction of the vehicle frame presents a shape that is narrow at both ends and wide in the middle. The narrow span is suitable for chassis suspension installation, and the wide span is used for power battery arrangement.

[0048] As a preferred embodiment of the present invention, the crossbeam assembly includes a first crossbeam assembly 10 and a second crossbeam assembly 11.

[0049] The first crossbeam assembly 10 includes a first crossbeam 12 and a first crossbeam connector 13. The first crossbeam connector 13 is used to connect the first crossbeam 12 to the front beam 1. A slot is provided on the side surface of the first crossbeam connector 13 for inserting the first crossbeam 12. The end of the first crossbeam 12 is inserted into the slot on the side surface of the first crossbeam connector 13 and screwed onto the first crossbeam connector 13. The upper part of the first crossbeam connector 13 has an upward-opening U-shaped groove. The first crossbeam connector 13 is inserted into the front beam 1 through its upper U-shaped groove and connected to the first crossbeam connector 13 by screwing.

[0050] The second crossbeam assembly 11 includes a second crossbeam 14 and a second crossbeam connector 15. The second crossbeam connector 15 connects the second crossbeam 14 to the front connecting beam assembly 2. A slot is provided on the side surface of the second crossbeam connector 15 for inserting the second crossbeam 14. The end of the second crossbeam 14 is inserted into the slot on the side surface of the second crossbeam connector 15 and screwed onto it. The upper top wall of the second crossbeam connector 15 is welded to the lower bottom wall of the front connecting beam assembly 2. A connecting protrusion 27 extending towards the side wall of the front connecting beam assembly 2 is provided on the upper top wall of the second crossbeam connector 15. The connecting protrusion 27 is welded to the side wall of the front connecting beam assembly 2, thereby connecting the second crossbeam connector 15 to both the lower bottom wall and the side wall of the front connecting beam assembly 2, improving the connection strength.

[0051] The first crossbeam connector 13 is made of aluminum alloy, the second crossbeam connector 15 is made of steel, and the first crossbeam 12 and the second crossbeam 14 are both made of aluminum alloy.

[0052] Since the first crossbeam connector 13 is connected to the front branch link 19 of the lower fork arm 28, in order to achieve the structural stability of the first crossbeam connector 13, it is connected to the first crossbeam 12 by screwing or riveting to improve the structural strength.

[0053] The second crossbeam connector 15 is made of the same material as the front connecting beam assembly 2. Welding can improve the connection efficiency, and the welding of metals of the same material can ensure the structural strength.

[0054] As a preferred technical solution of this utility model, it also includes a front shock absorber tower assembly 16, which includes a shock absorber column 18.

[0055] The damping column 18 is positioned above the connection point between the front beam 1 and the front connecting beam assembly 2. A U-shaped groove is provided at the lower part of the damping column 18, through which the damping column 18 is inserted into the front part of the front connecting beam assembly 2. Figure 4 As shown, the first fastening bolt 6 passes through the side wall of the shock-absorbing column 18, the outer plate of the connecting beam 8, the front beam 1, and the inner plate of the connecting beam 7, and fixes the shock-absorbing column 18, the front connecting beam assembly 2, and the front beam 1.

[0056] The upper fork 17 and lower fork 28 of the chassis are connected to the frame. Specifically, the upper fork 17 of the chassis is located at the upper end of the shock absorber column 18. The lower fork 28 of the chassis has a Y-shaped structure, with a front branch link 19 and a rear branch link 20 at its front. The first crossbeam connector 13 has a slot for inserting the front branch link 19 of the lower fork 28. The front branch link 19 is inserted into the slot on the first crossbeam connector 13 and is hinged to the first crossbeam connector 13. The second crossbeam connector 15 has a slot for inserting the rear branch link 20 of the lower fork 28. The rear branch link 20 is inserted into the slot on the second crossbeam connector 15 and is hinged to the second crossbeam connector 15.

[0057] As a preferred technical solution of this utility model, the crossbeam assembly further includes a third crossbeam assembly 21, a fourth crossbeam 22, and a fifth crossbeam 23. The third crossbeam assembly 21 is disposed between the rear connecting beam assembly 4 of the two sets of longitudinal beam assemblies 26 and includes a third crossbeam and a third crossbeam connector. The third crossbeam connector is used to connect the third crossbeam to the rear connecting beam assembly 4.

[0058] The fourth crossbeam 22 is located in front of the fifth crossbeam 23. Both the fourth crossbeam 22 and the fifth crossbeam 23 are located between the rear beam 5 assemblies of the two sets of longitudinal beam assemblies 26.

[0059] The third crossbeam connector is made of steel, while the third crossbeam, fourth crossbeam 22, and fifth crossbeam 23 are all made of aluminum alloy.

[0060] Preferably, the fourth crossbeam 22, the fifth crossbeam 23, and the rear beam 5 are connected by welding.

[0061] Preferably, the third crossbeam connector is welded to the rear connecting beam assembly.

[0062] As a preferred technical solution of this utility model, it also includes a front anti-collision beam assembly 24 and a rear anti-collision beam assembly 25. The front anti-collision beam assembly 24 is disposed at the front end of the two sets of longitudinal beam assemblies 26, and the rear anti-collision beam assembly 25 is disposed at the rear end of the two sets of longitudinal beam assemblies 26.

[0063] The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be included within the protection scope of the present invention.

Claims

1. A lightweight commercial vehicle frame, characterized in that, It includes two sets of longitudinal beam assemblies (26) and a crossbeam assembly disposed between the two sets of longitudinal beam assemblies (26); The two sets of longitudinal beam assemblies (26) have the same structure and are symmetrically arranged. They include a front beam (1), a front connecting beam assembly (2), a middle beam (3), a rear connecting beam assembly (4), a rear beam (5), a first fastening bolt (6), and a second fastening bolt. The front beam (1), the middle beam (3), and the rear beam (5) are all made of aluminum alloy and are all straight beam structures. The front beam (1) and the middle beam (3) are connected by the front connecting beam assembly (2), and the middle beam (3) and the rear beam (5) are connected by the rear connecting beam assembly (4). The front connecting beam assembly (2) and the rear connecting beam assembly (4) are both made of steel. The front connecting beam assembly (2) has an outwardly expanding curved structure, with its rear end extending outward relative to the front end, so that the distance between the front ends of the two front connecting beam assemblies (2) on the two sets of longitudinal beam assemblies (26) is smaller than the distance between the rear ends; the front end and the rear end of the front connecting beam assembly (2) are provided with slots, and the rear end of the front beam (1) is inserted into the slot at the front end of the front connecting beam assembly (2) and fixedly connected to the front connecting beam assembly (2) by the first fastening bolt (6); the front end of the middle beam (3) is inserted into the slot at the rear end of the front connecting beam assembly (2) and fixedly connected to the front connecting beam assembly (2) by the second fastening bolt; the rear connecting beam assembly (4) has the same structure as the front connecting beam assembly (2), and the rear connecting beam assembly (4) and the front connecting beam assembly (2) are symmetrically arranged at both ends of the middle beam (3).

2. The lightweight commercial vehicle frame according to claim 1, characterized in that, The front connecting beam assembly (2) includes a connecting beam inner plate (7) and a connecting beam outer plate (8) with U-shaped cross-sections. The connecting beam inner plate (7) and the connecting beam outer plate (8) are arranged opposite to each other in the U-shaped opening direction and interlocked to form a square slot structure. The upper top wall of the connecting beam outer plate (8) is located above the upper top wall of the connecting beam inner plate (7), and the lower bottom wall of the connecting beam outer plate (8) is located above the lower bottom wall of the connecting beam inner plate (7). The upper top wall of the front and rear of the inner plate (7) of the connecting beam is provided with a limiting notch, and the lower bottom wall of the front and rear of the outer plate (8) of the connecting beam is provided with a limiting notch. The ends of the front beam (1) and the middle beam (3) are located in the square slot structure enclosed by the inner plate (7) and the outer plate (8) of the connecting beam. The upper top wall of the front beam (1) and the middle beam (3) are in contact with the upper top wall of the outer plate (8) of the connecting beam and are riveted together. The lower bottom wall of the front beam (1) and the middle beam (3) are in contact with the lower bottom wall of the inner plate (7) of the connecting beam and are riveted together.

3. A light commercial vehicle frame according to claim 2, characterized in that, The first fastening bolt (6) passes through the outer plate (8) of the connecting beam, the outer side wall of the front beam (1), the inner side wall of the front beam (1), and the side wall of the inner plate (7) of the connecting beam in sequence, connecting the front connecting beam assembly (2) to the front beam (1).

4. A light commercial vehicle frame according to claim 1, characterized in that, It also includes a battery tray (9), which is disposed between two sets of longitudinal beam assemblies (26), and the two ends of the battery tray (9) are connected to the middle section beams (3) of the two sets of longitudinal beam assemblies (26).

5. A light commercial vehicle frame according to claim 2, characterized in that, It also includes the first crossbeam assembly (10) and the second crossbeam assembly (11); The first crossbeam assembly (10) includes a first crossbeam (12) and a first crossbeam connector (13). The first crossbeam (12) is connected to the front beam (1) through the first crossbeam connector (13). The side surface of the first crossbeam connector (13) is provided with a slot for the first crossbeam (12) to be inserted. The end of the first crossbeam (12) is inserted into the slot on the side surface of the first crossbeam connector (13) and screwed to the first crossbeam connector (13). The upper part of the first crossbeam connector (13) is provided with an upward-opening U-shaped groove. The first crossbeam connector (13) is inserted into the front beam (1) through the U-shaped groove on its upper part and is connected to the first crossbeam connector (13) by screwing. The second crossbeam assembly (11) includes a second crossbeam (14) and a second crossbeam connector (15). The second crossbeam (14) is connected to the front connecting beam assembly (2) through the second crossbeam connector (15). The side surface of the second crossbeam connector (15) is provided with a slot for the insertion of the second crossbeam (14). The end of the second crossbeam (14) is inserted into the slot on the side surface of the second crossbeam connector (15) and screwed to the second crossbeam connector (15). The upper top wall of the second crossbeam connector (15) is welded to the lower bottom wall of the front connecting beam assembly (2). The upper top wall of the second crossbeam connector (15) is provided with a connector protrusion (27) extending toward the side wall of the front connecting beam assembly (2). The connector protrusion (27) is welded to the side wall of the front connecting beam assembly (2). The first crossbeam connector (13) is made of aluminum alloy, the second crossbeam connector (15) is made of steel, and the first crossbeam (12) and the second crossbeam (14) are both made of aluminum alloy.

6. A light commercial vehicle frame according to claim 5, characterized in that, It also includes a front shock absorber tower assembly (16), which includes a shock absorber column (18). The shock-absorbing column (18) is located above the connection position between the front beam (1) and the front connecting beam assembly (2). The lower part of the shock-absorbing column (18) is provided with a U-shaped groove. The shock-absorbing column (18) is inserted into the front part of the front connecting beam assembly (2) through its U-shaped groove. The first fastening bolt (6) passes through the side wall of the shock-absorbing column (18), the outer plate (8) of the connecting beam, the front beam (1), and the inner plate (7) of the connecting beam, and fixes the shock-absorbing column (18), the front connecting beam assembly (2), and the front beam (1) in place. The upper fork arm (17) of the chassis is located at the upper end of the shock-absorbing column (18); The lower fork arm (28) of the chassis has a Y-shaped structure. The front part is provided with a front branch link (19) and a rear branch link (20). The first crossbeam connector (13) is provided with a slot for the insertion of the front branch link (19) of the lower fork arm (28). The front branch link (19) is inserted into the slot on the first crossbeam connector (13) and is hinged to the first crossbeam connector (13). The second crossbeam connector (15) is provided with a slot for the insertion of the rear branch link (20) of the lower fork arm (28). The rear branch link (20) is inserted into the slot on the second crossbeam connector (15) and is hinged to the second crossbeam connector (15).

7. A light commercial vehicle frame according to claim 1, characterized in that, The crossbeam assembly also includes a third crossbeam assembly (21), a fourth crossbeam (22), and a fifth crossbeam (23). The third crossbeam assembly (21) is located between the rear connecting beam assembly (4) of the two sets of longitudinal beam assemblies (26) and includes a third crossbeam and a third crossbeam connector. The third crossbeam is connected to the rear connecting beam assembly (4) through the third crossbeam connector. The fourth crossbeam (22) is located in front of the fifth crossbeam (23). The fourth crossbeam (22) and the fifth crossbeam (23) are both located between the rear beam (5) assemblies of the two sets of longitudinal beam assemblies (26). The third crossbeam connector is made of steel, and the third crossbeam, the fourth crossbeam (22), and the fifth crossbeam (23) are all made of aluminum alloy.

8. A light commercial vehicle frame according to claim 1, characterized in that, It also includes a front bumper beam assembly (24) and a rear bumper beam assembly (25), wherein the front bumper beam assembly (24) is located at the front end of the two sets of longitudinal beam assemblies (26), and the rear bumper beam assembly (25) is located at the rear end of the two sets of longitudinal beam assemblies (26).

Images