An aluminum alloy cargo box

Abstract

The utility model discloses an aluminum alloy container, including the box body assembly of area of containing, vice frame is located at the lower bottom of box body. Vice frame includes vice frame crossbeam, stringer, stringer connects crossbeam and first corner joint spare, second corner joint spare, first U-shaped connecting piece. Vice frame stringer longitudinal two groups, section U shape and opening opposite, and stringer connects crossbeam both ends and inserts stringer U shape opening and is screwed. Vice frame crossbeam is horizontally arranged, and the interval is even and is placed on the upper end of stringer, section U shape, and the opening faces forward, and first U-shaped connecting piece is in its opening, and the opening faces backward. One side of first corner joint spare is connected with stringer side, and the other side is screwed with the rear side wall of crossbeam, first U-shaped connecting piece front side wall, one side of second corner joint spare is connected with stringer upper top wall, and the other side is screwed with the rear side wall of crossbeam, first U-shaped connecting piece front side wall. The whole aluminum alloy container adopts aluminum alloy preparation, can reduce about 50% weight compared with corrugated plate steel container while guaranteeing structural strength.

Description

Technical Field

[0001] This utility model relates to the field of transportation technology, and in particular to an aluminum alloy cargo box. Background Technology

[0002] In recent years, my country's logistics industry has experienced rapid development, with a continuous increase in demand for freight transportation. Currently, truck cargo boxes in my country are mainly constructed from steel. Steel cargo boxes, with their excellent mechanical properties, can meet load-bearing requirements and offer advantages such as high load-bearing capacity, high hardness, and low cost, thus enjoying widespread use in the market. However, while steel cargo boxes possess these advantages, their inherent drawbacks are becoming increasingly apparent. First, steel is prone to corrosion, requiring regular maintenance and increasing operating costs. Second, the high density of steel results in a relatively high overall weight for the cargo box, which not only increases energy consumption during vehicle operation but also limits the load capacity of light trucks to some extent, making it difficult to meet current policy requirements for light truck load capacity. Utility Model Content

[0003] In view of this, this utility model discloses an aluminum alloy cargo box, which is made of aluminum alloy material to give it structural stability. The specific solution is as follows:

[0004] An aluminum alloy cargo box includes a subframe, floor assembly, roof assembly, front bulkhead assembly, left side bulkhead assembly, right side bulkhead assembly, and rear door assembly, all made of aluminum alloy.

[0005] The floor assembly, roof assembly, front bulkhead assembly, left side bulkhead assembly, right side bulkhead assembly, and rear door assembly together form a box assembly with accommodating space; the subframe is located at the lower bottom of the box assembly and includes a subframe crossbeam, a subframe longitudinal beam, a longitudinal beam connecting crossbeam, a first corner connector, a second corner connector, and a first U-shaped connector;

[0006] The subframe longitudinal beams are arranged longitudinally, and there are two sets of them, each with a U-shaped cross-section. The U-shaped opening sides of the two sets of subframe longitudinal beams are arranged opposite each other. The two ends of the longitudinal beam connecting the crossbeam are respectively inserted into the U-shaped openings of the two sets of longitudinal beams, and the subframe longitudinal beams are screwed together.

[0007] The subframe crossbeam is arranged laterally, and it has several groups that are evenly spaced and arranged on the upper end of the subframe longitudinal beam. The cross section of the subframe crossbeam is a U-shaped structure, with the U-shaped opening side of the subframe crossbeam facing the front side of the subframe. The first U-shaped connector is arranged in the U-shaped opening of the subframe crossbeam, and the opening side of the first U-shaped connector faces the rear side of the subframe.

[0008] Both the first and second corner connectors are L-shaped structures. The first side of the first corner connector is screwed to the side wall of the subframe longitudinal beam, and the second side of the first corner connector is screwed to the rear side wall of the subframe crossbeam and the front side wall of the first U-shaped connector.

[0009] The first side of the second corner connector is screwed to the top wall of the subframe longitudinal beam, and the second side of the second corner connector is screwed to the rear side wall of the subframe crossbeam and the front side wall of the first U-shaped connector.

[0010] As a supplement to the technical solution of this utility model, the base plate assembly includes a base plate profile; the base plate profile is provided in several groups, the left end of the base plate profile in the width direction is provided with an insertion part, the right end of the base plate profile in the width direction is provided with a groove, the insertion part of the left end of the base plate profile on the right side is inserted into the groove of the right end of the base plate profile on the left side, the insertion part is welded and fixed to the groove, and the base plate profile of the base plate assembly is riveted to the upper top wall of the subframe crossbeam of the subframe assembly.

[0011] As a supplement to the technical solution of this utility model, the front bulkhead assembly includes a front bulkhead upper crossbeam, a front bulkhead lower crossbeam, a front bulkhead vertical beam, a front bulkhead box assembly, a third corner connector, and a fourth corner connector;

[0012] The left and right ends of the front bulkhead assembly are provided with front bulkhead vertical beams, and the ends of the front bulkhead assembly are connected to the front bulkhead vertical beams through third corner connectors.

[0013] The lower end face of the crossbeam on the front bulkhead is provided with a slot, and the upper end of the vertical beam on the front bulkhead is inserted into the slot of the crossbeam on the front bulkhead and connected to the crossbeam on the front bulkhead with a rivet.

[0014] The upper end face of the lower crossbeam of the front bulkhead is provided with a slot, and the lower end of the vertical beam of the front bulkhead is inserted into the slot of the lower crossbeam of the front bulkhead and is riveted to the lower crossbeam of the side bulkhead.

[0015] The first side of the fourth corner connector is screwed to the side wall of the lower crossbeam of the front bulkhead, and the front end of the bottom plate profile of the bottom plate assembly is mounted on the second side of the fourth corner connector, and the front end of the bottom plate profile is screwed to the second side of the fourth corner connector.

[0016] As a supplement to the technical solution of this utility model, the front box panel assembly includes box panel units, and the box panel units are provided in at least two sets, and the box panel units are spliced ​​together to form the front box panel assembly;

[0017] The box panel unit includes a first box panel, a second box panel, a vertical core material, a horizontal core material, and an aluminum honeycomb panel;

[0018] The first and second boxes are spaced apart. There are at least two sets of vertical core materials, which are spaced apart along the width of the box unit. A horizontal core material connects two adjacent sets of vertical core materials. The end of the horizontal core material is connected to the middle of the vertical core material. An aluminum honeycomb panel is provided above and below the horizontal core material between the two vertical core materials. A strip-shaped groove is provided on the side surface of the horizontal and vertical core materials. The first and second boxes are bonded and fixed to the vertical core material, the horizontal core material, and the aluminum honeycomb panel.

[0019] In two adjacent panel units, the right end face of the vertical core material of the left panel unit is provided with a protrusion, and the left end face of the vertical core material of the right panel unit is provided with a slot. The protrusion of the vertical core material on the left panel unit is inserted into the slot of the vertical core material on the right panel unit.

[0020] As a supplement to the technical solution of this utility model, the left side panel assembly includes a left side upper crossbeam, a left side lower crossbeam, and a left side box panel assembly;

[0021] The left side panel assembly has the same structure as the front side panel assembly. A slot is provided on the bottom wall of the left side upper crossbeam. The upper end of the left side panel assembly is inserted into the slot of the left side upper crossbeam and is fixedly connected to the left side upper crossbeam by riveting.

[0022] The cross section of the left side lower beam is U-shaped, and the U-shaped opening faces the subframe. Two sets of relatively parallel vertical plates are provided on the upper top wall of the left side lower beam. The lower end of the left side box panel assembly is inserted between the two sets of vertical plates on the left side lower beam and riveted to the two sets of vertical plates.

[0023] The subframe also includes a T-shaped plate. A set of T-shaped plates is provided at both ends of the subframe crossbeam. The T-shaped plate includes a fixed panel and a connecting panel that are arranged perpendicularly to each other. The fixed panel is set in the U-shaped opening of the subframe crossbeam and is screwed to the rear side wall of the subframe crossbeam.

[0024] The connecting panel of the T-shaped plate at one end of the subframe crossbeam is located inside the U-shaped opening of the left lower crossbeam, and the side wall of the left lower crossbeam is screwed in.

[0025] As a supplement to the technical solution of this utility model, the right side enclosure assembly includes a right side upper crossbeam, a right side lower crossbeam, a first right side enclosure panel, a second right side enclosure panel, and a right side enclosure door;

[0026] The first right side enclosure panel and the second right side enclosure panel are spaced apart, and the right side enclosure door is located between the first right side enclosure panel and the second right side enclosure panel;

[0027] The right side upper beam is located at the upper end of the first right side enclosure panel, the second right side enclosure panel, and the right side enclosure door. A slot is provided on the lower surface of the right side upper beam located on the upper side of the first right side enclosure panel and the second right side enclosure panel. The upper ends of the first right side enclosure panel and the second right side enclosure panel are inserted into the slot and riveted to the right side upper beam.

[0028] The right side lower crossbeam is located at the lower end of the first right side panel, the second right side panel, and the right side panel door. The cross-section of the right side lower crossbeam is U-shaped, with the U-shaped opening facing the subframe. Two sets of spaced vertical plates are provided on the upper top wall of the right side lower crossbeam located below the first right side panel and the second right side panel. The lower ends of the first right side panel and the second right side panel are inserted between the two sets of vertical plates on the right side lower crossbeam and are fixedly connected to the two sets of vertical plates on the right side lower crossbeam by riveting.

[0029] The connecting panel of the T-shaped plate of the subframe crossbeam near the right lower crossbeam is located inside the U-shaped opening of the right lower crossbeam, and the connecting panel of the T-shaped plate at the end of the subframe crossbeam is screwed to the side wall of the right lower crossbeam.

[0030] The structures of the first right side enclosure panel and the second right side enclosure panel are the same as the structure of the enclosure panel unit.

[0031] As a supplement to the technical solution of this utility model, the rear door assembly includes an upper rear door crossbeam, a lower rear door crossbeam, a rear door vertical beam, and a rear door. The rear door vertical beams are provided in two sets and are spaced apart. The upper and lower rear door crossbeams are located between the two sets of rear door vertical beams. The upper and lower rear door crossbeams and the two sets of rear door vertical beams together form a square frame structure. The rear door is located within the square frame. The left end of the rear door is connected to the left rear door vertical beam, and the right end of the rear door is connected to the right rear door vertical beam.

[0032] As a supplement to the technical solution of this utility model, a corner connector is connected between the front panel vertical beam of the front panel assembly located inside the box assembly and the left side box panel assembly and the second right side box panel of the left side box assembly. The first side of the corner connector is screwed to the front panel vertical beam, and the second side of the corner connector is screwed to the left side box panel assembly or the second right side box panel.

[0033] An angle connector is connected between the rear door vertical beam of the rear door assembly located inside the box assembly and the left side box panel assembly and the first right side box panel of the left side assembly. The first side of the angle connector is screwed to the rear door vertical beam, and the second side of the angle connector is screwed to the left side box panel assembly or the first right side box panel.

[0034] It also includes a reinforcing plate, which is disposed on the outside of the housing assembly and has a triangular structure;

[0035] A set of reinforcing plates is connected between the upper end of the vertical beam of the left front panel and the front end of the upper crossbeam of the left side panel; a set of reinforcing plates is connected between the lower end of the vertical beam of the left front panel and the front end of the lower crossbeam of the left side panel; a set of reinforcing plates is connected between the upper end of the vertical beam of the right front panel and the front end of the upper crossbeam of the right side panel; a set of reinforcing plates is connected between the lower end of the vertical beam of the right front panel and the front end of the lower crossbeam of the left side panel.

[0036] A set of reinforcing plates is connected between the upper end of the rear door vertical beam on the left side of the rear door assembly and the rear end of the left side upper crossbeam; a set of reinforcing plates is connected between the lower end of the rear door vertical beam on the left side of the rear door assembly and the rear end of the left side lower crossbeam; a set of reinforcing plates is connected between the upper end of the rear door vertical beam on the right side of the rear door assembly and the rear end of the right side upper crossbeam; and a set of reinforcing plates is connected between the lower end of the rear door vertical beam on the right side of the rear door assembly and the rear end of the right side lower crossbeam.

[0037] As a supplement to the technical solution of this utility model, the roof assembly is disposed at the upper end of the front enclosure assembly, the left side enclosure assembly, the right side enclosure assembly, and the rear door assembly, and its sides are respectively screwed to the upper crossbeam of the front enclosure of the front enclosure assembly, the upper crossbeam of the left side enclosure of the left side enclosure assembly, the upper crossbeam of the right side enclosure of the right side enclosure assembly, and the upper crossbeam of the rear door assembly.

[0038] The roof assembly includes a roof skin and a top crossbeam. The roof skin is a plate-like structure, and several sets of roof skins are arranged along the length of the cargo box, with the ends of adjacent sets of roof skins abutting each other. A top crossbeam is located on the lower side of the abutting position between adjacent sets of roof skins. The top crossbeam is connected to each of the two sets of roof skins.

[0039] As a supplement to the technical solution of this utility model, the top crossbeam includes a U-shaped groove and a bent edge provided at the upper end of the sidewalls on both sides of the U-shaped groove, and the bent edge of the top crossbeam is riveted to the roof skin.

[0040] Beneficial effects: In terms of structural design, the aluminum alloy cargo box disclosed in this utility model features a subframe with a first U-shaped connector, which forms a "square tube" structure at the corresponding position of the subframe crossbeam, improving the stability between the subframe and the longitudinal beam. This design also replaces the previous square tube structure for the subframe crossbeam, further reducing weight. The bottom plate of the floor assembly is a corrugated plate structure, which improves deformation resistance. The bottom plate is fixed by insertion and welding, and riveted to the top wall of the subframe crossbeam, resulting in a stable structure. The front, left, and right side assemblies are connected by bolts instead of traditional welding, which is both stable and easy to disassemble. The box panel unit, with its vertical core material, horizontal core material, and aluminum honeycomb panel, ensures deformation resistance and structural strength, and is easy to assemble. The addition of reinforcing plates and corner connectors further enhances the structural stability of the box assembly. The roof skin of the roof assembly is connected to the top crossbeam, ensuring a reliable structure.

[0041] Meanwhile, the aluminum alloy cargo box is made entirely of aluminum alloy, which effectively reduces the overall weight. Compared with corrugated steel cargo boxes, it can reduce the weight by about 50%, which can effectively increase the load capacity of light trucks and avoid the problem of "large tonnage but small label" in light trucks. At the same time, aluminum alloy has strong corrosion resistance and a service life of 6-8 years, which is 2-3 times that of steel structures. Attached Figure Description

[0042] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0043] Figure 2 This is a three-dimensional structural diagram of the present invention.

[0044] Figure 3 This is a schematic diagram of the subframe structure of this utility model.

[0045] Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point A in the middle.

[0046] Figure 5 This is a schematic diagram of the assembly structure of the first U-shaped connector and the subframe crossbeam.

[0047] Figure 6 This is a schematic diagram of the assembly structure of the left side panel assembly, the right side panel assembly, and the subframe.

[0048] Figure 7 This is a schematic diagram of the roof assembly structure of this utility model.

[0049] Figure 8 This is a schematic diagram of the roof assembly structure of this utility model.

[0050] Figure 9 This is a schematic diagram of the base plate assembly structure of this utility model.

[0051] Figure 10 for Figure 9 Enlarged structural diagram at point B.

[0052] Figure 11 This is a schematic diagram of the front assembly structure of this utility model.

[0053] Figure 12 This is a schematic diagram of the assembly structure of the front upper crossbeam and the front box panel.

[0054] Figure 13 This is a schematic diagram of the assembly structure of the lower front crossbeam and the front box panel.

[0055] Figure 14 This is a schematic diagram of the box panel unit structure of this utility model.

[0056] Figure 15 This is a schematic diagram of the connection structure of the two sets of box panel units of this utility model.

[0057] Figure 16 This is a schematic diagram of the left side panel assembly of this utility model.

[0058] Figure 17 This is a schematic diagram of the left side lower crossbeam structure of this utility model.

[0059] Figure 18 This is a schematic diagram of the right side panel assembly of this utility model.

[0060] Figure 19 This is a schematic diagram of the right-side lower crossbeam structure of this utility model.

[0061] Figure 20 This is a schematic diagram of the right-side upper crossbeam structure of this utility model.

[0062] Figure 21 This is a schematic diagram of the rear door assembly of this utility model.

[0063] In the diagram: 100. Subframe, 101. Subframe crossbeam, 102. Subframe longitudinal beam, 103. Longitudinal beam connecting crossbeam, 104. First corner connector, 105. Second corner connector, 106. First U-shaped connector, 107. T-shaped plate;

[0064] 200. Base plate assembly; 201. Base plate profile;

[0065] 300. Ceiling assembly; 301. Ceiling skin; 302. Ceiling crossbeam;

[0066] 400. Front bulkhead assembly; 401. Front bulkhead upper crossbeam; 402. Front bulkhead lower crossbeam; 403. Front bulkhead vertical beam; 404. Front bulkhead box panel assembly; 405. Third corner connector; 406. Fourth corner connector; 407. Box panel unit; 408. First box panel; 409. Second box panel; 410. Vertical core material; 411. Horizontal core material;

[0067] 500. Left side panel assembly; 501. Left side panel upper crossbeam; 502. Left side panel lower crossbeam; 503. Left side panel assembly;

[0068] 600. Right side enclosure assembly; 601. Right side enclosure upper crossbeam; 602. Right side enclosure lower crossbeam; 603. First right side enclosure panel; 604. Second right side enclosure panel; 605. Right side enclosure door;

[0069] 700. Rear door assembly; 701. Upper crossbeam of rear door; 702. Lower crossbeam of rear door; 703. Vertical beam of rear door; 704. Rear door;

[0070] 800. Reinforcing plate. Detailed Implementation

[0071] 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.

[0072] 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.

[0073] like Figures 1 to 21 As shown, an aluminum alloy cargo box is made entirely of aluminum alloy, which effectively reduces the overall weight and increases the cargo capacity of light trucks. At the same time, aluminum alloy has strong corrosion resistance and a service life of 6-8 years, which is 2-3 times that of steel structures. It includes a subframe 100, a floor assembly 200, a roof assembly 300, a left side panel assembly 500, a right side panel assembly 600, and a rear door assembly 700.

[0074] The bottom plate assembly 200, the roof assembly 300, the front panel assembly 400, the left side panel assembly 500, the right side panel assembly 600, and the rear door assembly 700 are combined to form a box assembly for accommodating goods and having internal storage space.

[0075] The subframe 100 is located at the bottom of the body assembly and includes a subframe crossbeam 101, a subframe longitudinal beam 102, a longitudinal beam connecting crossbeam 103, a first corner connector 104, a second corner connector 105, and a first U-shaped connector 106. The first corner connector 104 and the second corner connector 105 are both L-shaped.

[0076] The subframe longitudinal beams 102 are arranged longitudinally, and there are two sets of subframe longitudinal beams 102, both with a U-shaped cross-section. The U-shaped openings of the two sets of subframe longitudinal beams 102 are arranged opposite each other. The two ends of the longitudinal beam connecting beam 103 are respectively inserted into the U-shaped openings of the two sets of longitudinal beams and screwed to the subframe longitudinal beams 102. One end of the longitudinal beam connecting beam 103 is inserted into the U-shaped opening of one set of subframe longitudinal beams 102 and screwed to the subframe longitudinal beam 102, while the other end of the longitudinal beam connecting beam 103 is inserted into the U-shaped opening of the other set of subframe longitudinal beams 102 and screwed to the subframe longitudinal beam 102.

[0077] The subframe crossbeam 101 is arranged laterally, and several groups of them are evenly spaced and arranged on the upper end of the subframe longitudinal beam 102. The cross section of the subframe crossbeam 101 is U-shaped, with the U-shaped opening facing the front of the subframe 100. The first U-shaped connector 106 is disposed in the U-shaped opening of the subframe crossbeam 101, and its cross section is U-shaped, with the opening facing the rear of the subframe 100.

[0078] The first side of the first corner connector 104 is screwed to the side wall of the subframe longitudinal beam 102. The second side of the first corner connector 104, the rear side wall of the subframe crossbeam 101, and the front side wall of the first U-shaped connector 106 are screwed together. In actual assembly, a screw is used to pass through the second side of the first corner connector 104, the rear side wall of the subframe crossbeam 101, and the front side wall of the first U-shaped connector 106 in sequence, and then a nut is screwed onto the screw.

[0079] The first side of the second corner connector 105 is screwed to the top wall of the subframe longitudinal beam 102. The second side of the second corner connector 105, the rear side wall of the subframe crossbeam 101, and the front side wall of the first U-shaped connector 106 are screwed together. In actual assembly, a screw is used to pass through the second side of the second corner connector 105, the rear side wall of the subframe crossbeam 101, and the front side wall of the first U-shaped connector 106 in sequence, and then a nut is screwed onto the screw.

[0080] The first corner connector 104 is screwed to the first U-shaped connector 106 at the first end of the front side wall of the first U-shaped connector 106 along its length. The second corner connector 105 is screwed to the first U-shaped connector 106 at the middle of the front side wall of the first U-shaped connector 106 along its length. The second end of the front side wall of the first U-shaped connector 106 is screwed to the rear side wall of the subframe crossbeam 101.

[0081] Without the first U-shaped connector 106, the subframe crossbeam 101 is prone to deformation at the connection points with the first corner connector 104 and the second corner connector 105. The first U-shaped connector 106 creates a "square tube" structure at the location where it is installed, improving stability with the subframe longitudinal beam 102 and replacing the overall square tube design of the subframe crossbeam 101, thus further reducing weight.

[0082] As a supplement to the technical solution of this utility model, the base plate assembly 200 includes a base plate profile 201.

[0083] The base plate profile 201 is provided in several groups. The left end of the base plate profile 201 in the width direction has an insertion part, and the right end of the base plate profile 201 in the width direction has a groove. The insertion part at the left end of the right-side base plate profile 201 is inserted into the groove at the right end of the left-side base plate profile 201, and then welded and fixed. Several groups of base plate profiles 201 are spliced ​​to form a base plate assembly 200. The base plate profile 201 has a corrugated plate structure with a thickness of 2mm to improve its deformation resistance. The base plate profile 201 of the base plate assembly 200 is riveted to the upper top wall of the subframe crossbeam 101 of the subframe 100 assembly.

[0084] As a preferred embodiment of this utility model, the front bulkhead assembly includes a front bulkhead upper crossbeam 401, a front bulkhead lower crossbeam 402, a front bulkhead vertical beam 403, a front bulkhead box assembly 404, a third corner connector 405, and a fourth corner connector 406. Both the third corner connector 405 and the fourth corner connector 406 are L-shaped structures.

[0085] The front bulkhead assembly 404 is provided with front bulkhead vertical beams 403 at both the left and right ends. There are two sets of third corner connectors 405. The first side of the third corner connector 405 is screwed to the rear end face of the left / right side of the front bulkhead assembly 404, and the second side of the third corner connector 405 is screwed to the side wall of the front bulkhead vertical beam 403, so as to realize the fixed connection between the front bulkhead vertical beam 403 and the front bulkhead assembly 404.

[0086] The lower end face of the crossbeam 401 on the front bulkhead is provided with a slot. Specifically, the crossbeam 401 on the front bulkhead is a square tube structure, and two sets of vertically arranged plates are provided on its lower bottom wall, forming a slot structure with the lower bottom wall of the square tube. The upper end of the vertical beam 403 on the front bulkhead is inserted into the slot of the crossbeam 401 on the front bulkhead and is fixedly connected to the crossbeam on the side bulkhead by riveting.

[0087] The upper end face of the lower crossbeam 402 of the front bulkhead is provided with a slot. Specifically, the lower crossbeam 402 of the front bulkhead is a square tube structure, and two sets of vertically arranged plates are provided on its upper top wall, forming a slot structure with the upper top wall of the square tube. The lower end of the vertical beam 403 of the front bulkhead is inserted into the slot of the lower crossbeam 402 of the front bulkhead and is fixedly connected to the lower crossbeam of the side bulkhead by riveting.

[0088] The first side of the fourth corner connector 406 is screwed to the rear side wall of the lower crossbeam 402 of the front bulkhead. The front end of the bottom plate profile 201 of the bottom plate assembly 200 is mounted on the second side of the fourth corner connector 406, and the front end of the bottom plate profile 201 is screwed to the second side of the fourth corner connector 406, thereby realizing the fixed connection between the bottom plate assembly 200 and the lower crossbeam 402 of the front bulkhead.

[0089] By using screw connections instead of traditional welding connections, the connection is secure and easy to disassemble.

[0090] As a supplement to the above technical solution, the front bulkhead panel assembly 404 includes panel units 407, and the panel units 407 are provided in at least two sets. The panel units 407 are spliced ​​together to form the front bulkhead panel assembly 404.

[0091] The box panel unit 407 includes a first box panel 408, a second box panel 409, a vertical core material 410, a horizontal core material 411, and an aluminum honeycomb panel.

[0092] The first panel 408 and the second panel 409 are spaced apart. At least two sets of vertical core materials 410 are provided and arranged at intervals along the width direction of the panel unit 407. A transverse core material 411 is welded between adjacent sets of vertical core materials 410. The end of the transverse core material 411 is connected to the middle of the vertical core material 410. An aluminum honeycomb panel is provided between the two vertical core materials 410, above and below the transverse core material 411. The first panel 408 and the second panel 409 are bonded and fixed to the vertical core materials 410, the transverse core materials 411, and the aluminum honeycomb panel. Vertical core materials 410 should be provided at both the left and right ends of the panel unit 407.

[0093] The side surfaces of both the transverse core material 411 and the vertical core material 410 are provided with strip-shaped grooves, which increases the contact area between the adhesive and the vertical core material 410 and the transverse core material 411, thereby improving the bonding effect.

[0094] By setting up vertical core material 410, horizontal core material 411, and aluminum honeycomb panels, the gap between the two boxes is filled to ensure its deformation resistance. At the same time, the design of the honeycomb panels can not only achieve the technical effect of gap filling, but also ensure structural strength.

[0095] When two adjacent panel units 407 need to be spliced, the right end face of the vertical core material 410 located at the right end of the left panel unit 407 has a protrusion, which is a rib-like structure. The left end face of the vertical core material 410 located at the left end of the right panel unit 407 has a slot. The protrusion on the left vertical core material 410 is inserted into the slot on the right vertical core material 410, and the protrusion on the left vertical core material 410 is fixedly connected to the slot on the right core material.

[0096] Specifically, screw connections or welded connections can be used.

[0097] Through the above settings, several groups of box panel units 407 are spliced ​​together to form the front box panel assembly 404.

[0098] Preferably, the thickness of the first box panel 408 and the second box panel 409 is 0.8mm. The vertical core material 410 and the horizontal core material 411 are both made by aluminum alloy extrusion process and have honeycomb reinforcing ribs inside. This improves the structural strength of the vertical core material 410 and the horizontal core material 411 while achieving a further weight reduction effect. The first box panel 408 and the second box panel 409 are bonded to both sides of the vertical core material 410 and the horizontal core material 411 to form a box panel unit 407, which has an overall thickness of 15mm.

[0099] As a preferred technical solution of this utility model, the left side panel assembly 500 includes a left side upper crossbeam 501, a left side lower crossbeam 502, and a left side panel assembly 503.

[0100] The structure of the left side panel assembly 503 is the same as that of the front side panel assembly 404. A slot is provided on the lower bottom wall of the left side upper beam 501. The upper end of the left side panel assembly 503 is inserted into the slot of the left side upper beam 501, and the upper end of the left side panel assembly 503 is fixedly connected to the left side upper beam 501 by riveting.

[0101] The left side lower crossbeam 502 has a U-shaped cross section, with the U-shaped opening facing the subframe 100. Two sets of parallel vertical plates are provided on the upper top wall of the left side lower crossbeam 502. These two sets of vertical plates, along with the upper top wall of the left side lower crossbeam 502, form a slot for the lower end of the left side panel assembly 503 to be inserted. The lower end of the left side panel assembly 503 is inserted into the slot on the left side lower crossbeam 502 and fixedly connected to the left side lower crossbeam 502 by rivets.

[0102] The subframe 100 also includes a T-shaped plate 107, which includes a fixed panel and a connecting panel arranged perpendicularly to each other. The fixed panel is disposed in the U-shaped opening of the subframe crossbeam 101 and is fixedly connected to the rear side wall of the subframe crossbeam 101 by bolts.

[0103] The connecting panel is located within the U-shaped opening of the left side lower crossbeam 502 and is fixedly connected to the side wall of the left side lower crossbeam 502 by bolts. This arrangement further enhances the overall structural stability by establishing a fixed connection between the subframe 100 and the left side assembly 500.

[0104] T-shaped plates 107 are provided at both ends of the length of the subframe crossbeam 101.

[0105] The structure of the left side panel assembly 503 is the same as that of the front side panel assembly 404.

[0106] As a preferred technical solution of this utility model, the right side enclosure assembly 600 includes a right side upper crossbeam 601, a right side lower crossbeam 602, a first right side enclosure panel 603, a second right side enclosure panel 604, and a right side enclosure door 605.

[0107] The first right side enclosure panel 603 and the second right side enclosure panel 604 are spaced apart. The right side enclosure door 605 is located between the first right side enclosure panel 603 and the second right side enclosure panel 604. The left end of the right side enclosure door is connected to the first right side enclosure panel 603, and the right end of the right side enclosure door is connected to the second right side enclosure panel 604. The right side enclosure door 605 is a traditional double-door structure design for cargo boxes, which includes the door, the horizontal structure, and the lock, etc. The main structure of the door is the same as that of the box panel unit 407.

[0108] The right side upper beam 601 is located at the upper end of the first right side enclosure panel 603, the second right side enclosure panel 604, and the right side enclosure door 605. A slot is provided on the lower surface of the right side upper beam 601 located on the upper side of the first right side enclosure panel 603 and the second right side enclosure panel 604. The upper ends of the first right side enclosure panel 603 and the second right side enclosure panel 604 are inserted into the slot and fixedly connected to the right side upper beam 601 by riveting.

[0109] The right side lower crossbeam 602 is located at the lower end of the first right side enclosure panel 603, the second right side enclosure panel 604, and the right side enclosure door 605.

[0110] The right side lower crossbeam 602 has a U-shaped cross section, with its U-shaped opening facing the subframe 100. Two sets of spaced vertical plates are provided on the upper top wall of the right side lower crossbeam 602, located below the first right side panel 603 and the second right side panel 604. These two sets of vertical plates, together with the upper top wall of the right side lower crossbeam 602, form a slot structure for the lower ends of the first right side panel 603 and the second right side panel 604 to be inserted. The lower ends of the first right side panel 603 and the second right side panel 604 are inserted into the slots on the right side lower crossbeam 602 and are fixedly connected to the right side lower crossbeam 602 by riveting.

[0111] The end of the subframe crossbeam 101 on the subframe 100 near the right side lower crossbeam 602 is located in the U-shaped opening of the right side lower crossbeam 602, and the connecting panel of the T-shaped plate 107 at the end of the subframe crossbeam 101 is screwed to the side wall of the right side lower crossbeam 602.

[0112] The structures of the first right side enclosure panel 603 and the second right side enclosure panel 604 are the same as those of the enclosure panel unit 407.

[0113] As a preferred embodiment of this utility model, the rear door assembly 700 includes an upper rear door crossbeam 701, a lower rear door crossbeam 702, a rear door vertical beam 703, and a rear door 704. Two sets of rear door vertical beams 703 are provided and spaced apart. The upper rear door crossbeam 701 and the lower rear door crossbeam 702 are located between the two sets of rear door vertical beams 703. The upper rear door crossbeam 701, the lower rear door crossbeam 702, and the two sets of rear doors... The vertical beams 703 form a square frame structure. The ends of the upper horizontal beam 701 and the lower horizontal beam 702 of the rear door are fixedly connected to the vertical beams 703 of the rear door. The rear door 704 is set in the square frame. The left end of the rear door 704 is connected to the left rear door vertical beam 703, and the right end of the rear door 704 is connected to the right rear door vertical beam 703. The rear door 704 is a double door structure, which is the same as the structure of the right side enclosure door 605.

[0114] As a preferred technical solution of this utility model, it also includes a reinforcing plate 800.

[0115] Corner connectors are provided between the front bulkhead vertical beam 403 of the front bulkhead assembly inside the housing assembly and between the left side bulkhead assembly 503 and the second right side bulkhead 604 of the left side bulkhead assembly 500. The first side of the corner connector is screwed to the front bulkhead vertical beam 403, and the second side of the corner connector is screwed to the left side bulkhead assembly 503 or the second right side bulkhead 604. Specifically, the screws to the left side bulkhead assembly 503 and the second right side bulkhead 604 are screwed through the first panel 408 of the left side bulkhead assembly 503 or the second right side bulkhead 604 and screwed into the vertical core material 410.

[0116] Corner connectors are provided between the rear door vertical beam 703 of the rear door assembly 700 located inside the box assembly and the left side panel assembly 503 and the first right side panel 603 of the left side panel assembly 500. The first side of the corner connector is screwed to the rear door vertical beam 703, and the second side of the corner connector is screwed to the left side panel assembly 503 or the first right side panel 603. Specifically, the screwing method with the left side panel assembly 503 and the first right side panel 603 is that the screw passes through the first panel 408 of the left side panel assembly 503 or the second right side panel 604 and is screwed into the vertical core material 410.

[0117] The reinforcing plate 800 is located on the outside of the housing assembly and has a triangular structure.

[0118] A reinforcing plate 800 is screwed between the front bulkhead vertical beam 403 located on the left side of the front bulkhead assembly and the left side upper crossbeam 501 and left side lower crossbeam 502 of the left side bulkhead assembly 500. Specifically, a set of reinforcing plates 800 is connected between the upper end of the left front bulkhead vertical beam 403 and the front end of the left side upper crossbeam 501, and a set of reinforcing plates 800 is connected between the lower end of the left front bulkhead vertical beam 403 and the front end of the left side lower crossbeam 502.

[0119] A reinforcing plate 800 is screwed between the front bulkhead vertical beam 403 on the right side of the front bulkhead assembly and the right side upper crossbeam 601 and right side lower crossbeam 602 of the right side bulkhead assembly 600. Specifically, a set of reinforcing plates 800 is connected between the upper end of the right front bulkhead vertical beam 403 and the front end of the right side upper crossbeam 601, and a set of reinforcing plates 800 is connected between the lower end of the right front bulkhead vertical beam 403 and the front end of the left side lower crossbeam 502.

[0120] A set of reinforcing plates 800 connects the upper end of the rear door vertical beam 703 located on the left side of the rear door assembly 700 to the rear end of the left side upper crossbeam 501. A set of reinforcing plates 800 also connects the lower end of the rear door vertical beam 703 located on the left side of the rear door assembly 700 to the rear end of the left side lower crossbeam 502. Similarly, a set of reinforcing plates 800 connects the upper end of the rear door vertical beam 703 located on the right side of the rear door assembly 700 to the rear end of the right side upper crossbeam 601. A set of reinforcing plates 800 also connects the lower end of the rear door vertical beam 703 located on the right side of the rear door assembly 700 to the rear end of the right side lower crossbeam 602. The reinforcing plates 800 can be connected to the crossbeams and vertical beams by riveting or screwing.

[0121] The structural stability of the enclosure assembly is further improved by adding reinforcement plate 800.

[0122] As a preferred technical solution of this utility model, the canopy assembly 300 is disposed at the upper end of the front enclosure assembly 400, the left side enclosure assembly 500, the right side enclosure assembly 600, and the rear door assembly 700, and its sides are respectively screwed to the upper crossbeam of the front enclosure of the front enclosure assembly 400, the upper crossbeam of the left side enclosure of the left side enclosure assembly 500, the upper crossbeam of the right side enclosure of the right side enclosure assembly 600, and the upper crossbeam of the rear door of the rear door assembly 700.

[0123] The roof assembly 300 includes a roof skin 301 and a top crossbeam 302. The roof skin 301 is a plate-like structure, and several sets of roof skins 301 are arranged along the length of the cargo box, with the ends of adjacent sets of roof skins 301 abutting each other. A top crossbeam 302 is located below the abutting position of adjacent sets of roof skins 301. The top crossbeam 302 connects to two sets of roof skins 301 respectively, achieving a fixed connection between the two sets of roof skins 301. The thickness of the roof skin 301 is 0.8 mm.

[0124] Preferably, the top crossbeam 302 includes a U-shaped groove and bent edges located at the upper ends of the sidewalls on both sides of the U-shaped groove, which are riveted to the roof skin 301.

[0125] The aluminum alloy cargo box prepared by this invention can reduce weight by about 50% compared to corrugated steel cargo boxes and by about 15% compared to fiberglass sandwich panel cargo boxes, effectively avoiding the problem of "large tonnage, small label" for light trucks.

[0126] The 4.2-meter aluminum alloy cargo box prepared according to this utility model was subjected to strength, trampling, stiffness, and snow load tests. The conclusions are as follows: when the cargo box is loaded with 1.5 tons, no permanent deformation occurred under vertical, braking, and turning conditions; the cargo box did not undergo permanent deformation under trampling conditions; the stiffness of the front and side walls of the cargo box meets the standard requirements of JT / T389-2010 Technical Conditions for Box Trailers; the top cover of the cargo box has strong snow load resistance.

[0127] 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. An aluminum alloy cargo box, characterized in that, It includes a subframe (100), floor assembly (200), roof assembly (300), front bulkhead assembly (400), left side bulkhead assembly (500), right side bulkhead assembly (600), and rear door assembly (700), all made of aluminum alloy. The floor assembly (200), roof assembly (300), front bulkhead assembly (400), left side bulkhead assembly (500), right side bulkhead assembly (600), and rear door assembly (700) together form a box assembly with a accommodating space; the subframe (100) is located at the lower bottom of the box assembly, and includes a subframe crossbeam (101), a subframe longitudinal beam (102), a longitudinal beam connecting crossbeam (103), a first corner connector (104), a second corner connector (105), and a first U-shaped connector (106). The subframe longitudinal beam (102) is arranged longitudinally, and it has two sets with U-shaped cross sections. The U-shaped opening sides of the two sets of subframe longitudinal beams (102) are arranged opposite each other. The two ends of the longitudinal beam connecting crossbeam (103) are respectively inserted into the U-shaped openings of the two sets of longitudinal beams and screwed to the subframe longitudinal beam (102). The subframe crossbeam (101) is arranged laterally, and it is provided with several groups of evenly spaced crossbeams on the upper end of the subframe longitudinal beam (102). The cross section of the subframe crossbeam (101) is a U-shaped structure. The U-shaped opening side of the subframe crossbeam (101) faces the front side of the subframe (100). The first U-shaped connector (106) is provided in the U-shaped opening of the subframe crossbeam (101). The opening side of the first U-shaped connector (106) faces the rear side of the subframe (100). Both the first corner connector (104) and the second corner connector (105) are L-shaped structures. The first side of the first corner connector (104) is screwed to the side wall of the subframe longitudinal beam (102), and the second side of the first corner connector (104) is screwed to the rear side wall of the subframe crossbeam (101) and the front side wall of the first U-shaped connector (106). The first side of the second corner connector (105) is screwed to the top wall of the subframe longitudinal beam (102), and the second side of the second corner connector (105), the rear side wall of the subframe crossbeam (101), and the front side wall of the first U-shaped connector (106) are screwed together.

2. The aluminum alloy cargo box according to claim 1, characterized in that, The base plate assembly (200) includes a base plate profile (201); the base plate profile (201) is provided with several groups, the left end of the base plate profile (201) in the width direction is provided with a plug-in part, the right end of the base plate profile (201) in the width direction is provided with a groove, the plug-in part of the left end of the base plate profile (201) on the right side is plugged into the groove of the right end of the base plate profile (201) on the left side, the plug-in part is welded and fixed to the groove, and the base plate profile (201) of the base plate assembly (200) is riveted to the top wall of the subframe crossbeam (101) of the subframe (100) assembly.

3. The aluminum alloy cargo box according to claim 1, characterized in that, The front bulkhead assembly (400) includes a front bulkhead upper crossbeam (401), a front bulkhead lower crossbeam (402), a front bulkhead vertical beam (403), a front bulkhead box assembly (404), a third corner connector (405), and a fourth corner connector (406). The left and right ends of the front bulkhead assembly (404) are provided with front bulkhead vertical beams (403), and the ends of the front bulkhead assembly (404) are connected to the front bulkhead vertical beams (403) through the third corner connector (405). The lower end face of the crossbeam (401) on the front panel is provided with a slot, and the upper end of the vertical beam (403) on the front panel is inserted into the slot of the crossbeam (401) on the front panel and riveted to the crossbeam (401) on the front panel. The upper end face of the lower crossbeam (402) of the front panel is provided with a slot, and the lower end of the vertical beam (403) of the front panel is inserted into the slot of the lower crossbeam (402) of the front panel and riveted to the lower crossbeam of the side panel. The first side of the fourth corner connector (406) is screwed to the side wall of the lower crossbeam (402) of the front bulkhead, and the front end of the bottom plate profile (201) of the bottom plate assembly (200) is mounted on the second side of the fourth corner connector (406), and the front end of the bottom plate profile (201) is screwed to the second side of the fourth corner connector (406).

4. An aluminum alloy cargo box according to claim 3, characterized in that, The front bulkhead panel assembly (404) includes panel units (407), and the panel units (407) are provided in at least two sets. The panel units (407) are spliced ​​together to form the front bulkhead panel assembly (404). The box panel unit (407) includes a first box panel (408), a second box panel (409), a vertical core material (410), a horizontal core material (411), and an aluminum honeycomb panel; The first box panel (408) and the second box panel (409) are spaced apart. There are at least two sets of vertical core materials (410) and they are spaced apart along the width direction of the box panel unit (407). A horizontal core material (411) is connected between two adjacent sets of vertical core materials (410). The end of the horizontal core material (411) is connected to the middle of the vertical core material (410). An aluminum honeycomb panel is provided between the two vertical core materials (410) above and below the horizontal core material (411). A strip-shaped groove is provided on the side surface of the horizontal core material (411) and the vertical core material (410). The first box panel (408) and the second box panel (409) are bonded and fixedly connected to the vertical core material (410), the horizontal core material (411), and the aluminum honeycomb panel. In the two sets of adjacent panel units (407), the right end face of the vertical core material (410) at the right end of the panel unit (407) on the left side is provided with a protrusion, and the left end face of the vertical core material (410) at the left end of the panel unit (407) on the right side is provided with a slot. The protrusion of the vertical core material (410) on the left panel unit (407) is inserted into the slot of the vertical core material (410) on the right panel unit (407).

5. An aluminum alloy cargo box according to claim 3, characterized in that, The left side panel assembly (500) includes a left side upper crossbeam (501), a left side lower crossbeam (502), and a left side panel assembly (503). The structure of the left side panel assembly (503) is the same as that of the front side panel assembly (404). The bottom wall of the left side upper beam (501) is provided with a slot. The upper end of the left side panel assembly (503) is inserted into the slot of the left side upper beam (501) and is fixedly connected to the left side upper beam (501) by riveting. The cross section of the left side lower crossbeam (502) is a U-shaped structure, and the U-shaped opening faces the subframe (100); the upper top wall of the left side lower crossbeam (502) is provided with two sets of vertical plates arranged in parallel to each other, and the lower end of the left side box panel assembly (503) is inserted between the two sets of vertical plates on the left side lower crossbeam (502) and riveted to the two sets of vertical plates. The subframe (100) also includes a T-shaped plate (107). Both ends of the subframe crossbeam (101) are provided with a set of T-shaped plates (107). The T-shaped plate (107) includes a fixed panel and a connecting panel arranged perpendicularly to each other. The fixed panel is set in the U-shaped opening of the subframe crossbeam (101) and screwed to the rear side wall of the subframe crossbeam (101). The connecting panel of the T-shaped plate (107) provided at one end of the subframe crossbeam (101) is located in the U-shaped opening of the left lower crossbeam (502), and the side wall of the left lower crossbeam (502) is screwed in.

6. An aluminum alloy cargo box according to claim 5, characterized in that, The right side enclosure assembly (600) includes a right side upper crossbeam (601), a right side lower crossbeam (602), a first right side enclosure panel (603), a second right side enclosure panel (604), and a right side enclosure door (605). The first right side enclosure panel (603) and the second right side enclosure panel (604) are spaced apart, and the right side enclosure door (605) is located between the first right side enclosure panel (603) and the second right side enclosure panel (604); The right side upper beam (601) is located at the upper end of the first right side enclosure panel (603), the second right side enclosure panel (604), and the right side enclosure door (605). A slot is provided on the lower surface of the right side upper beam (601) located on the upper side of the first right side enclosure panel (603) and the second right side enclosure panel (604). The upper ends of the first right side enclosure panel (603) and the second right side enclosure panel (604) are inserted into the slot and riveted to the right side upper beam (601). The right side lower beam (602) is located at the lower end of the first right side panel (603), the second right side panel (604), and the right side panel door (605). The cross section of the right side lower beam (602) is U-shaped, with its U-shaped opening facing the subframe (100). Two sets of spaced vertical plates are provided on the upper top wall of the right side lower beam (602) located below the first right side panel (603) and the second right side panel (604). The lower ends of the first right side panel (603) and the second right side panel (604) are inserted between the two sets of vertical plates on the right side lower beam (602) and are fixedly connected to the two sets of vertical plates on the right side lower beam (602) by riveting. The connecting panel of the T-shaped plate (107) of the subframe crossbeam (101) on the subframe (100) near the right side lower crossbeam (602) is located in the U-shaped opening of the right side lower crossbeam (602), and the connecting panel of the T-shaped plate (107) at the end of the subframe crossbeam (101) is screwed to the side wall of the right side lower crossbeam (602). The structures of the first right side enclosure panel (603) and the second right side enclosure panel (604) are the same as those of the panel unit (407).

7. An aluminum alloy cargo box according to claim 6, characterized in that, The rear door assembly (700) includes an upper rear door crossbeam (701), a lower rear door crossbeam (702), a rear door vertical beam (703), and a rear door (704). The rear door vertical beam (703) is provided in two sets and is spaced apart. The upper rear door crossbeam (701) and the lower rear door crossbeam (702) are located between the two sets of rear door vertical beams (703). The upper rear door crossbeam (701), the lower rear door crossbeam (702), and the two sets of rear door vertical beams (703) together form a square frame structure. The rear door (704) is located within the square frame. The left end of the rear door (704) is connected to the left rear door vertical beam (703), and the right end of the rear door (704) is connected to the right rear door vertical beam (703).

8. An aluminum alloy cargo box according to claim 7, characterized in that, An angle connector is connected between the front bulkhead vertical beam (403) of the front bulkhead assembly located inside the box assembly and the left side bulkhead assembly (500) of the left side bulkhead assembly (503) and the second right side bulkhead assembly (604). The first side of the angle connector is screwed to the front bulkhead vertical beam (403), and the second side of the angle connector is screwed to the left side bulkhead assembly (503) or the second right side bulkhead assembly (604). An angle connector is connected between the rear door vertical beam (703) of the rear door assembly (700) located inside the box assembly and the left side box panel assembly (503) and the first right side box panel (603) of the left side box assembly (500). The first side of the angle connector is screwed to the rear door vertical beam (703), and the second side of the angle connector is screwed to the left side box panel assembly (503) or the first right side box panel (603). It also includes a reinforcing plate (800), which is disposed on the outside of the housing assembly and has a triangular structure; A set of reinforcing plates (800) is connected between the upper end of the front panel vertical beam (403) on the left and the front end of the left upper beam (501), and a set of reinforcing plates (800) is connected between the lower end of the front panel vertical beam (403) on the left and the front end of the left lower beam (502); a set of reinforcing plates (800) is connected between the upper end of the front panel vertical beam (403) on the right and the front end of the right upper beam (601), and a set of reinforcing plates (800) is connected between the lower end of the front panel vertical beam (403) on the right and the front end of the left lower beam (502). A set of reinforcing plates (800) is connected between the upper end of the rear door vertical beam (703) located on the left side of the rear door assembly (700) and the rear end of the left side upper crossbeam (501). A set of reinforcing plates (800) is connected between the lower end of the rear door vertical beam (703) located on the left side of the rear door assembly (700) and the rear end of the left side lower crossbeam (502). A set of reinforcing plates (800) is connected between the upper end of the rear door vertical beam (703) located on the right side of the rear door assembly (700) and the rear end of the right side upper crossbeam (601). A set of reinforcing plates (800) is connected between the lower end of the rear door vertical beam (703) located on the right side of the rear door assembly (700) and the rear end of the right side lower crossbeam (602).

9. An aluminum alloy cargo box according to claim 7, characterized in that, The roof assembly (300) is located at the upper end of the front bulkhead assembly (400), the left side bulkhead assembly (500), the right side bulkhead assembly (600), and the rear door assembly (700), and its sides are respectively screwed to the front upper crossbeam of the front bulkhead assembly (400), the left upper crossbeam (501) of the left side bulkhead assembly (500), the right upper crossbeam (601) of the right side bulkhead assembly (600), and the rear upper crossbeam (701) of the rear door assembly (700); The roof assembly (300) includes a roof skin (301) and a top crossbeam (302); the roof skin (301) is a plate-like structure, and the roof skin (301) is provided in several groups and arranged along the length of the cargo box, with the ends of two adjacent roof skin groups (301) abutting each other; a top crossbeam (302) is provided on the lower side of the abutting position of two adjacent roof skin groups (301); the top crossbeam (302) is connected to two roof skin groups (301) respectively.

10. An aluminum alloy cargo box according to claim 9, characterized in that, The top crossbeam (302) includes a U-shaped groove and a bent edge located at the upper end of the sidewalls on both sides of the U-shaped groove. The bent edge of the top crossbeam (302) is riveted to the roof skin (301).

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