Lightweight container with arched side walls

Abstract

The invention relates to the technical field of structural design of light-weight containers, and provides a light-weight container with arched side walls, which consists of a front side coaming assembly, a rear side coaming assembly, a left side coaming assembly, a right side coaming assembly and a bottom plate assembly, a front side coaming panel in the front side coaming assembly is of an arched curved surface structure in the length direction of the front side coaming assembly and is arched backwards, and a rear side coaming panel in the rear side coaming assembly is of an arched curved surface structure in the length direction of the rear side coaming assembly and is arched forwards. A left side coaming panel in the left side coaming assembly is of an arch-shaped curved surface structure in the length direction and arches towards the right side, and a right side coaming panel in the right side coaming assembly is of an arch-shaped curved surface structure in the length direction and arches towards the left side. The container has the advantages of being low in cost, remarkable in weight reduction effect, uniform in stress after loading, high in container structural rigidity and the like, and has wide market application prospects.

Description

Technical Field

[0001] The present invention relates to the technical field of lightweight cargo box structure design, and in particular to a lightweight cargo box with arched side walls. Background Art

[0002] According to statistics, commercial vehicles account for 20% to 25% of the total automotive fleet in my country, yet they contribute 50% to 70% to the industry's fuel consumption and produce emissions approximately three to four times that of passenger vehicles. A 10% reduction in vehicle weight can reduce emissions by 5% to 6%, making lightweighting commercial vehicles a crucial approach to energy conservation and emissions reduction. The cargo box accounts for 20% to 30% of a commercial vehicle's total weight, making lightweighting a key area of commercial vehicle lightweighting.

[0003] CN202310703091.4 discloses a lightweight cargo box and vehicle, wherein the lightweight cargo box is made of aluminum alloy. CN202120867409.9 discloses a lightweight box body for a dump truck, wherein the side panels of the box body are formed by pressing steel plates using a mold, and the pressing ribs are used to improve the bending resistance of the steel plates, while saving auxiliary reinforcements and reducing weight. CN202320355398.5 discloses a lightweight flatbed cargo box and truck, wherein the side panels are manufactured using an integrated molding process, and the outer surface of the side panels is folded to form multiple raised structures to increase the strength of the flatbed cargo box, thereby forming a lightweight flatbed cargo box. CN201520018742.7 discloses a lightweight, wide-body cargo box for a mining dump truck. The front panel assembly forms a right angle with the bottom panel assembly, the rear gate assembly forms an inner angle of 80° to 85° with the bottom panel assembly, and the side panel assembly forms a right angle at the front and an inner angle of 80° to 85° at the rear, thereby improving the rigidity of the cargo box after loading. CN202311850234.0 discloses a lightweight cargo box for a light mining truck. The cargo box body adopts a trumpet-shaped and upturned design. The front top of the cargo box body is welded with an extended roof, and the rear tailgate with a convex arc structure is welded with the rear of the cargo box body. CN202121458816.0 discloses a lightweight, high-strength automobile cargo box side panel. A reinforcement plate is fixedly installed in the inner cavity of the main panel, and the top and bottom of the reinforcement plate are fixedly connected to the second side panel. A support column is inserted through the inner side of the reinforcement plate to improve the rigidity of the cargo box. CN202321846552.5 discloses a lightweight structural assembly of a dump truck that can prevent deformation and expansion of the cargo box. The anti-expansion of the cargo box is achieved by welding and fixing multiple angle steels to the top of the upper frame of the cargo box.

[0004] CN201710403599.7 discloses a new type of lightweight elevated box for heavy trucks. It improves force distribution through reasonable assembly design, allowing each component to play a role in the overall structural strength, thereby reducing the weight of the cargo box assembly.

[0005] In summary, although the existing cargo box structure design schemes have met some market demands, they still have many shortcomings: some use emerging materials such as aluminum alloy as a whole, which is more expensive than steel and is not conducive to large-scale production; some increase the rigidity of the cargo box by changing the local assembly angle of the side panels and the bottom panel or designing the cargo box into a trumpet shape, and the manufacturing process is relatively complicated; others increase the rigidity of the cargo box by adding angle steel or reinforcing plates, but the lightweight effect is not obvious. Summary of the Invention

[0006] In response to the above-mentioned technical problems, a lightweight cargo box with arched side walls is provided.

[0007] The technical means adopted in the present invention are as follows:

[0008] A lightweight cargo box with arched side walls, comprising a front side panel assembly, a rear side panel assembly, a left side panel assembly, a right side panel assembly and a bottom panel assembly; the front side panel assembly comprises a front side panel panel, the front side panel panel is an arched curved surface structure in its length direction and is arched toward the rear; the rear side panel assembly comprises a rear side panel panel, the rear side panel panel is an arched curved surface structure in its length direction and is arched toward the front; the left side panel assembly comprises a left side panel panel, the left side panel panel is an arched curved surface structure in its length direction and is arched toward the right, and the left side panel panel is The front end is connected to the left end of the front side panel panel, and the rear end of the left side panel panel is connected to the left end of the rear side panel panel; the right side panel assembly includes a right side panel panel, and the right side panel panel has an arched curved structure in its length direction and is arched toward the left, the front end of the right side panel panel is connected to the right end of the front side panel panel, and the rear end of the right side panel panel is connected to the right end of the rear side panel panel; the bottom panel assembly includes a bottom panel panel, and the top surface of the bottom panel panel is connected to the bottom end of the front side panel panel, the bottom end of the rear side panel panel, the bottom end of the left side panel panel and the bottom end of the right side panel panel.

[0009] Furthermore, the front side panel assembly also includes a front upper cross beam, a front lower cross beam, a front left longitudinal beam and a front right longitudinal beam, and the front upper cross beam, the front lower cross beam, the front left longitudinal beam and the front right longitudinal beam are respectively fixedly installed on the upper end, lower end, left end and right end of the front side panel.

[0010] Furthermore, the rear side panel assembly also includes a rear upper cross beam, a rear lower cross beam, a rear left longitudinal beam and a rear right longitudinal beam, and the rear upper cross beam, rear lower cross beam, rear left longitudinal beam and rear right longitudinal beam are respectively fixedly installed on the upper end, lower end, left end and right end of the rear side panel.

[0011] Furthermore, the left side panel assembly also includes a left upper cross beam, a left lower cross beam, a left front longitudinal beam and a left rear longitudinal beam, and the left upper cross beam, the left lower cross beam, the left front longitudinal beam and the left rear longitudinal beam are respectively fixedly installed on the upper end, lower end, front end and rear end of the left side panel.

[0012] Furthermore, the right side panel assembly also includes a right upper cross beam, a right lower cross beam, a right front longitudinal beam and a right rear longitudinal beam, and the right upper cross beam, the right lower cross beam, the right front longitudinal beam and the right rear longitudinal beam are respectively fixedly installed on the upper end, lower end, front end and rear end of the right side panel.

[0013] Furthermore, the floor assembly includes a front floor crossbeam, a rear floor crossbeam, a left floor crossbeam and a right floor crossbeam, and the front floor crossbeam, the rear floor crossbeam, the left floor crossbeam and the right floor crossbeam are respectively fixedly installed on the front end, rear end, left end and right end of the floor panel.

[0014] Furthermore, the left front longitudinal beam and the left rear longitudinal beam are respectively connected to the front left longitudinal beam and the rear left longitudinal beam, the right front longitudinal beam and the right rear longitudinal beam are respectively connected to the front right longitudinal beam and the rear right longitudinal beam, and the front lower cross beam, the rear lower cross beam, the left lower cross beam and the right lower cross beam are respectively connected to the front cross beam, the rear cross beam, the left cross beam and the rear cross beam of the bottom plate.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] In the present invention, the front side panel has an arched curved surface structure in its length direction and is arched toward the rear, the rear side panel has an arched curved surface structure in its length direction and is arched toward the front, the left side panel has an arched curved surface structure in its length direction and is arched toward the right, and the right side panel has an arched curved surface structure in its length direction and is arched toward the left. Compared with the existing technology, when the front side panel, the rear side panel, the left side panel and the right side panel are all subjected to normal loads, the deformation generated is smaller and the panel weight reduction ratio is higher. The present invention has the advantages of low cost, significant lightweight and weight reduction effect, uniform force after loading, and high cargo box structure rigidity, and has broad market application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0018] Figure 1 This is an overall structural diagram of a lightweight cargo box with arched side walls in Example 1 of the present invention;

[0019] Figure 2 It is an overall structural diagram of the front side panel, rear side panel, left side panel and right side panel in the present invention;

[0020] Figure 3 The displacement distribution diagram of a cargo box in the prior art when it is made of a flat plate and subjected to a specified load;

[0021] Figure 4 is a displacement distribution diagram of a cargo box in the prior art when it is made of corrugated board and subjected to a specified load;

[0022] Figure 5 is a displacement distribution diagram of the present invention when it is made of a flat plate and subjected to a specified load;

[0023] Figure 6 is a displacement distribution diagram of the present invention when it is made of corrugated board and subjected to a specified load;

[0024] Figure numbers: 1-front side panel assembly; 2-rear side panel assembly; 3-left side panel assembly; 4-right side panel assembly; 5-bottom panel assembly; 101-front side panel panel; 201-rear side panel panel; 301-left side panel panel; 401-right side panel panel; 501-bottom panel. DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0027] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0028] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values described in these embodiments do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0029] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0030] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0031] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0032] Example 1:

[0033] like Figure 1 and Figure 2 As shown, a lightweight cargo box with arched side walls includes a front side panel assembly 1, a rear side panel assembly 2, a left side panel assembly 3, a right side panel assembly 4 and a bottom panel assembly 5; the front side panel assembly 1 includes a front side panel panel 101, which has an arched curved surface structure in its length direction and is arched toward the rear; the rear side panel assembly 2 includes a rear side panel panel 201, which has an arched curved surface structure in its length direction and is arched toward the front; the left side panel assembly 3 includes a left side panel panel 301, which has an arched curved surface structure in its length direction and is arched toward the right, and the front end of the left side panel panel 301 is aligned with the front side panel surface The left end of the panel 101 is connected, and the rear end of the left side panel 301 is connected to the left end of the rear side panel 201; the right side panel assembly 4 includes a right side panel 401, and the right side panel 401 has an arched curved structure in its length direction and is arched toward the left, the front end of the right side panel 401 is connected to the right end of the front side panel 101, and the rear end of the right side panel 401 is connected to the right end of the rear side panel 201; the bottom panel assembly 5 includes a bottom panel 501, and the top surface of the bottom panel 501 is connected to the bottom end of the front side panel 101, the bottom end of the rear side panel 201, the bottom end of the left side panel 301 and the bottom end of the right side panel 401.

[0034] Specifically, the front side panel 101, the rear side panel 201, the left side panel 301, the right side panel 401 and the bottom panel 501 are all made of flat plates or corrugated plates, and the flat plates or corrugated plates are all made of strip steel. Making strip steel into flat plates or corrugated plates and making flat plates or corrugated plates into arched curved structures are conventional technical means in this field and will not be elaborated here.

[0035] In addition, the panel arch heights of the front side panel 101 , the rear side panel 201 , the left side panel 301 and the right side panel 401 are all 100 mm, and the panel thicknesses are all 1.6 mm or 0.6 mm.

[0036] In this embodiment, the front side panel assembly 1 also includes a front upper cross beam, a front lower cross beam, a front left longitudinal beam and a front right longitudinal beam, and the front upper cross beam, the front lower cross beam, the front left longitudinal beam and the front right longitudinal beam are respectively fixedly installed on the upper end, lower end, left end and right end of the front side panel panel 101.

[0037] In this embodiment, the rear side panel assembly 2 also includes a rear upper cross beam, a rear lower cross beam, a rear left longitudinal beam and a rear right longitudinal beam, and the rear upper cross beam, rear lower cross beam, rear left longitudinal beam and rear right longitudinal beam are respectively fixedly installed on the upper end, lower end, left end and right end of the rear side panel panel 201.

[0038] In this embodiment, the left side panel assembly 3 also includes a left upper cross beam, a left lower cross beam, a left front longitudinal beam and a left rear longitudinal beam. The left upper cross beam, the left lower cross beam, the left front longitudinal beam and the left rear longitudinal beam are respectively fixedly installed on the upper end, lower end, front end and rear end of the left side panel panel 301.

[0039] In this embodiment, the right side panel assembly 4 also includes a right upper crossbeam, a right lower crossbeam, a right front longitudinal beam and a right rear longitudinal beam, and the right upper crossbeam, the right lower crossbeam, the right front longitudinal beam and the right rear longitudinal beam are respectively fixedly installed on the upper end, lower end, front end and rear end of the right side panel panel 401.

[0040] In this embodiment, the floor assembly 5 includes a front floor beam, a rear floor beam, a left floor beam and a right floor beam, and the front floor beam, the rear floor beam, the left floor beam and the right floor beam are respectively fixedly installed on the front end, rear end, left end and right end of the floor panel 501.

[0041] In this embodiment, the left front longitudinal beam and the left rear longitudinal beam are respectively connected to the front left longitudinal beam and the rear left longitudinal beam (welded or hinged), the right front longitudinal beam and the right rear longitudinal beam are respectively connected to the front right longitudinal beam and the rear right longitudinal beam (welded or hinged), and the front lower cross beam, rear lower cross beam, left lower cross beam and right lower cross beam are respectively connected to the front cross beam, rear cross beam, left cross beam and rear cross beam of the bottom plate (welded or hinged).

[0042] Example 2:

[0043] like Figure 2 As shown, a lightweight cargo box with arched side walls includes a front side panel assembly 1, a rear side panel assembly 2, a left side panel assembly 3, a right side panel assembly 4 and a bottom panel assembly 5; the front side panel assembly 1 includes a front side panel panel 101, which has an arched curved surface structure in its length direction and is arched toward the rear; the rear side panel assembly 2 includes a rear side panel panel 201, which has an arched curved surface structure in its length direction and is arched toward the front; the left side panel assembly 3 includes a left side panel panel 301, which has an arched curved surface structure in its length direction and is arched toward the right, and the front end of the left side panel panel 301 is connected to the left end of the front side panel panel 101 (welded or hinged), and the left The rear end of the side panel 301 is connected to the left end of the rear side panel panel 201 (welded or hinged); the right side panel assembly 4 includes a right side panel panel 401, and the right side panel panel 401 has an arched curved structure in its length direction and is arched toward the left, the front end of the right side panel panel 401 is connected to the right end of the front side panel panel 101 (welded or hinged), and the rear end of the right side panel panel 401 is connected to the right end of the rear side panel panel 201 (welded or hinged); the bottom plate assembly 5 includes a bottom plate panel 501, and the top surface of the bottom plate panel 501 is connected to the bottom end of the front side panel panel 101, the bottom end of the rear side panel panel 201, the bottom end of the left side panel panel 301 and the bottom end of the right side panel panel 401 (welded or hinged).

[0044] Specifically, the front side panel 101, the rear side panel 201, the left side panel 301, the right side panel 401 and the bottom panel 501 are all made of flat plates or corrugated plates, and the flat plates or corrugated plates are all made of strip steel. Making strip steel into flat plates or corrugated plates and making flat plates or corrugated plates into arched curved structures are conventional technical means in this field and will not be elaborated here.

[0045] In addition, the panel arch heights of the front side panel 101 , the rear side panel 201 , the left side panel 301 and the right side panel 401 are all 100 mm, and the panel thicknesses are all 1.6 mm or 0.6 mm.

[0046] The working principle of the embodiment of the present invention is as follows:

[0047] In the prior art, the side wall of the cargo box is a straight structure; when it is made of a flat plate and subjected to a specified load, its displacement distribution diagram is as follows Figure 3 As shown, Figure 3 In the color-displacement comparison table A, the displacements corresponding to the different colors from top to bottom are 14.26mm, 12.67mm, 11.09mm, 9.506mm, 7.921mm, 6.337mm, 4.753mm, 3.169mm, 1.584mm and 0mm respectively; when it is made of corrugated board and subjected to a specified load, its displacement distribution diagram is as follows Figure 4 As shown, Figure 4 In the color-displacement comparison table B, the displacements corresponding to different colors from top to bottom are 15.4mm, 13.69mm, 11.98mm, 10.27mm, 8.558mm, 6.846mm, 5.135mm, 3.423mm, 1.712mm and 0mm.

[0048] In the embodiment of the present invention, the front side panel 101 has an arched curved surface structure in its length direction and arches toward the rear, the rear side panel 201 has an arched curved surface structure in its length direction and arches toward the front, the left side panel 301 has an arched curved surface structure in its length direction and arches toward the right, and the right side panel 401 has an arched curved surface structure in its length direction and arches toward the left; when the embodiment of the present invention is made of a flat plate and is subjected to a specified load, its displacement distribution diagram is as follows Figure 5 As shown, Figure 5 In the color-displacement comparison table C, the displacements corresponding to the different colors from top to bottom are 5.146mm, 4.574mm, 4.002mm, 3.431mm, 2.859mm, 2.287mm, 1.715mm, 1.144mm, 0.5718mm and 0mm respectively. When the embodiment of the present invention is made of corrugated board and subjected to a specified load, its displacement distribution diagram is as follows: Figure 6 As shown, Figure 6 In the color-displacement comparison table D, the displacements corresponding to different colors from top to bottom are 8.788mm, 7.811mm, 6.835mm, 5.858mm, 4.882mm, 3.906mm, 2.929mm, 1.953mm, 0.9764mm and 0mm.

[0049] It is not difficult to see that the front side panel 101, the rear side panel 201, the left side panel 301 and the right side panel 401 in the embodiment of the present invention have smaller deformations after being loaded and are more evenly distributed, while the side walls of the cargo box in the prior art have larger deformations after being loaded and are concentrated in the middle and upper part of the cargo box, which can easily cause the cargo box to collapse.

[0050] In addition, the thickness of the panel in the embodiment of the present invention can be reduced to 60% to 80% of the thickness of the panel in the prior art.

[0051] Therefore, the embodiments of the present invention have the advantages of low cost, significant lightweight and weight reduction effect, uniform force after loading, and high cargo box structural rigidity, and have broad market application prospects.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A lightweight cargo box with arched side walls, characterized in that: It includes a front side panel assembly (1), a rear side panel assembly (2), a left side panel assembly (3), a right side panel assembly (4) and a bottom panel assembly (5); The front side panel assembly (1) comprises a front side panel panel (101), wherein the front side panel panel (101) has an arched curved surface structure in its length direction and arches toward the rear; The rear side panel assembly (2) comprises a rear side panel panel (201), wherein the rear side panel panel (201) has an arched curved surface structure in its length direction and arches toward the front; The left side panel assembly (3) comprises a left side panel (301), wherein the left side panel (301) is an arched curved surface structure in its length direction and arches toward the right, wherein the front end of the left side panel (301) is connected to the left end of the front side panel (101), and the rear end of the left side panel (301) is connected to the left end of the rear side panel (201); The right side panel assembly (4) comprises a right side panel (401), wherein the right side panel (401) is an arched curved surface structure in its length direction and arches toward the left, wherein the front end of the right side panel (401) is connected to the right end of the front side panel (101), and the rear end of the right side panel (401) is connected to the right end of the rear side panel (201); The floor assembly (5) includes a floor panel (501), the top surface of which is connected to the bottom end of the front side panel (101), the bottom end of the rear side panel (201), the bottom end of the left side panel (301) and the bottom end of the right side panel (401).

2. A lightweight cargo box with arched side walls according to claim 1, characterized in that: The front side panel assembly (1) further comprises a front upper cross beam, a front lower cross beam, a front left longitudinal beam and a front right longitudinal beam, wherein the front upper cross beam, the front lower cross beam, the front left longitudinal beam and the front right longitudinal beam are respectively fixedly mounted on the upper end, the lower end, the left end and the right end of the front side panel (101).

3. The lightweight cargo box with arched side walls according to claim 1, characterized in that: The rear side panel assembly (2) further comprises a rear upper cross beam, a rear lower cross beam, a rear left longitudinal beam and a rear right longitudinal beam, wherein the rear upper cross beam, rear lower cross beam, rear left longitudinal beam and rear right longitudinal beam are respectively fixedly mounted on the upper end, lower end, left end and right end of the rear side panel panel (201).

4. The lightweight cargo box with arched side walls according to claim 1, characterized in that: The left side panel assembly (3) further comprises a left upper cross beam, a left lower cross beam, a left front longitudinal beam and a left rear longitudinal beam, wherein the left upper cross beam, the left lower cross beam, the left front longitudinal beam and the left rear longitudinal beam are respectively fixedly mounted on the upper end, the lower end, the front end and the rear end of the left side panel (301).

5. The lightweight cargo box with arched side walls according to claim 1, characterized in that: The right side panel assembly (4) further comprises a right upper cross beam, a right lower cross beam, a right front longitudinal beam and a right rear longitudinal beam, wherein the right upper cross beam, the right lower cross beam, the right front longitudinal beam and the right rear longitudinal beam are respectively fixedly mounted on the upper end, the lower end, the front end and the rear end of the right side panel (401).

6. The lightweight cargo box with arched side walls according to claim 1, characterized in that: The floor assembly (5) comprises a floor front crossbeam, a floor rear crossbeam, a floor left crossbeam and a floor right crossbeam, wherein the floor front crossbeam, floor rear crossbeam, floor left crossbeam and floor right crossbeam are respectively fixedly mounted on the front end, rear end, left end and right end of the floor panel (501).

7. A lightweight cargo box with arched side walls according to any one of claims 1 to 6, characterized in that: The left front longitudinal beam and the left rear longitudinal beam are respectively connected to the front left longitudinal beam and the rear left longitudinal beam, the right front longitudinal beam and the right rear longitudinal beam are respectively connected to the front right longitudinal beam and the rear right longitudinal beam, the front lower cross beam, the rear lower cross beam, the left lower cross beam and the right lower cross beam are respectively connected to the front cross beam, the rear cross beam, the left cross beam and the rear cross beam of the bottom plate.

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