Container type portal frame structure and vehicle

Abstract

The utility model provides a container type portal frame structure and a vehicle, the container type portal frame structure comprises an upper cross beam, a rectangular tube cross beam, a pair of rectangular tube vertical beams and a pair of supporting vertical beams, the upper cross beam, the rectangular tube cross beam and the pair of rectangular tube vertical beams jointly define a rectangular front wall gantry frame, and a plurality of reinforcing beams are arranged in the front wall gantry frame at intervals; the supporting vertical beams are located below the front wall gantry frame and connected with the two ends of the rectangular tube cross beam respectively, and upper reinforcing structures are arranged at the joints of the bottom of the front wall gantry frame and the supporting vertical beams. According to the container type portal frame structure and the vehicle, the structural strength is improved, and reliability and safety are high.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a cargo box type gantry structure and a vehicle. Background Art

[0002] The mini truck cargo box can be divided into independent and semi-independent types according to the assembly form. The semi-independent cargo box shares the same rear enclosure with the passenger compartment cab, that is, the front enclosure of the cargo box is also the rear enclosure of the vehicle body, and the box is connected to the vehicle body only by the door lock mechanism on both sides. This structural design can reduce weight by about 25kg and has high economic benefits. However, while reducing weight, the support stiffness of the gantry area of ​​the semi-independent cargo box is insufficient, making this connection transition area the weakest for the entire vehicle (cracking failure caused by uneven road torsion conditions and low-frequency modal resonance).

[0003] Therefore, it is necessary to provide an improved cargo box type gantry structure and vehicle to solve the above problems. Utility Model Content

[0004] The present application provides a cargo box type gantry structure and a vehicle with improved structural strength, reliability and safety.

[0005] The present application discloses a cargo box type gantry structure, comprising a rectangular front gantry frame and a pair of supporting vertical beams, wherein a plurality of reinforcing beams are arranged at intervals inside the front gantry frame; the pair of supporting vertical beams are located below the front gantry frame, and an upper reinforcing structure is arranged at the connection between the bottom of the front gantry frame and the supporting vertical beams.

[0006] Furthermore, the front wall gantry frame includes an upper crossbeam, a rectangular tube crossbeam and a pair of rectangular tube vertical beams, and the pair of supporting vertical beams are respectively connected to two ends of the rectangular tube crossbeam.

[0007] Furthermore, the upper reinforcement structure includes an upper reinforcement member, the upper reinforcement member is a tubular angle steel, the upper reinforcement member includes a first top surface, a first bottom surface and a pair of first side surfaces, and the first side surfaces are trapezoidal.

[0008] Furthermore, the upper reinforcement is provided on both inner and outer sides of each of the supporting vertical beams, and the openings at both ends of the upper reinforcement located on the inner side of the supporting vertical beam are respectively closed by the rectangular tube cross beam and the supporting vertical beam, and the openings at both ends of the upper reinforcement located on the outer side of the supporting vertical beam are respectively closed by the rectangular tube vertical beam and the supporting vertical beam.

[0009] Furthermore, the upper reinforcement structure also includes a cover plate, which covers the upper reinforcement member and the upper part of the supporting vertical beam from the rear; the length of the reinforcement beam in the front-rear direction of the vehicle body is greater than its length in the width direction of the vehicle body.

[0010] Furthermore, the supporting vertical beam includes a main body and a buckle plate, the main body includes a main board located on the outside and a pair of flanges bent inward from the front and rear sides of the main board, the main board and the pair of flanges enclose a vertical beam cavity, and the buckle plate is located at the upper part of the vertical beam cavity and buckled with the main body.

[0011] Furthermore, it also includes a bottom cross beam located at the bottom of the supporting vertical beam, and the bottom cross beam, the rectangular tube cross beam, and a pair of the supporting vertical beams together form a rectangular supporting frame.

[0012] Furthermore, a lower reinforcement is provided at the connection between the supporting vertical beam and the bottom cross beam, and the lower reinforcement is a tubular angle steel; the openings at both ends of the lower reinforcement are respectively closed by the bottom cross beam and the supporting vertical beam, and the lower reinforcement is arranged on the inner side of the supporting vertical beam.

[0013] Furthermore, the supporting vertical beam includes a main body and a connecting member located in the main body, the connecting member is a tubular structure with a closed bottom, and the lower reinforcement and the bottom cross beam are both welded to the connecting member.

[0014] Furthermore, it also includes a pair of supporting longitudinal beams arranged along the front-rear direction of the vehicle body and a plurality of sheet-like supporting angle plates arranged along the width direction of the vehicle body, wherein the supporting longitudinal beams are located at both ends of the bottom cross beam; the supporting angle plates are overlapped with the supporting vertical beams and the supporting longitudinal beams respectively.

[0015] The present application also discloses a vehicle, comprising a cargo box floor, frames located on both sides of the cargo box floor, a boarding step connected to the front end of the frame, and the cargo box gantry structure as described above, wherein the cargo box gantry structure is installed on the rear periphery of the vehicle body, and a rectangular through hole is provided between the cargo box floor and the frame for the support vertical beam to pass through, and the length of the rectangular through hole in the front-to-rear direction of the vehicle body is greater than its length in the width direction of the vehicle body.

[0016] The cargo box gantry structure and vehicle of the present application are provided with a reinforcing structure at the connection between the bottom of the front gantry frame and the supporting vertical beam, so that the structural strength of the overlap between the front gantry frame and the supporting vertical beam is effectively strengthened, and the risk of cracking at the overlap is avoided to a great extent, thereby improving the safety and reliability of the cargo box gantry structure and the vehicle, and can simultaneously achieve the goal of cost reduction and lightweighting.

[0017] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the specification and, together with the description, serve to explain the principles of the specification.

[0019] Figure 1 It is a schematic diagram of the cargo box type gantry structure of the present application.

[0020] Figure 2 yes Figure 1 Front view of the medium cargo box gantry structure.

[0021] Figure 3 yes Figure 1 Side view of the medium cargo box gantry structure.

[0022] Figure 4 It is a schematic diagram of the cargo box type gantry structure of the present application being connected with the cargo box bottom plate, frame and boarding step.

[0023] Figure 5 yes Figure 4 Enlarged view of point A in the middle.

[0024] Figure 6 yes Figure 4 Enlarged view of point B in the middle.

[0025] Figure 7 It is a partial schematic diagram of the supporting vertical beam of the present application.

[0026] Figure 8 It is a schematic diagram of the upper reinforcement member of the present application.

[0027] Fig. 9 yes Figure 4 Enlarged view of point C in the middle.

[0028] Fig.10 It is a schematic diagram of the connector of the present application.

[0029] Fig.11 It is a schematic diagram of the lower reinforcement member of the present application.

[0030] Fig.12 It is a partial schematic diagram of the connection between the cargo box bottom plate and the frame of the present application.

[0031] Fig.13 It is a partial bottom view of the cargo box type gantry structure of the present application when it is connected with the cargo box bottom plate, frame and boarding step.

[0032] Explanation of the accompanying figures: 10, front gantry frame; 11, upper crossbeam; 12, rectangular tube crossbeam; 13, rectangular tube vertical beam; 14, reinforcement beam; 20, support frame; 21, support vertical beam; 211, main body; 2111, main board; 2112, flange; 2113, vertical beam cavity; 212, gusset plate; 213, connector; 2131, notch; 22, bottom crossbeam; 30, upper reinforcement structure; 31, upper reinforcement member; 311, first top surface; 312, first bottom surface; 313, first side surface; 32, cover plate; 40, lower reinforcement member; 41, second top surface; 42, second bottom surface; 43, second side surface; 50, support longitudinal beam; 60, support angle plate; 70, cargo box bottom plate; 71, rectangular through hole; 80, frame; 90, boarding step. DETAILED DESCRIPTION

[0033] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following exemplary embodiments do not represent all implementations consistent with this specification. Instead, they are merely examples of devices and methods consistent with some aspects of this specification as detailed in the appended claims.

[0034] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. Unless otherwise defined, the technical terms or scientific terms used in this specification should be understood by people with ordinary skills in the field to which this application belongs. The words "first", "second" and similar words used in this specification and claims do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not indicate a quantitative limit, but indicate the existence of one. "Multiple" or "several" means two or more. Unless otherwise specified, words such as "front", "rear", "lower" and / or "upper" are only for the convenience of explanation and are not limited to one position or one spatial orientation. Words such as "include" or "comprise" mean that the elements or objects appearing in front of "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, and can include electrical connections, whether direct or indirect.

[0035] The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit the present application. The singular forms of "a", "the" and "the" used in this specification and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0036] At present, the semi-independent cargo boxes on the market have the defect of insufficient structural design stiffness and strength. In the process of identifying risky locations, the modal and strength calculations in finite element simulation analysis are used to find the weak locations of design defects.

[0037] Finite element simulation analysis uses professional analysis software to discretize the structural grid, load the boundary environmental conditions of the working condition, and automatically calculate the modal frequency value, modal vibration type and stress value under impact strength conditions.

[0038] Modal frequency and modal vibration pattern are inherent properties of the structure. When the external excitation frequency value is the same as the structural natural frequency value, resonance will occur. When the vibration amplitude is too large, it will cause damage and cracking at the weak position of the design defect. Due to design defects, under the influence of modal vibration, the self-stiffness support is weak (the factors participating in the modal calculation formula are stiffness and mass, that is, low stiffness and low modal frequency), and the resistance to the self-weight inertia impact force is insufficient, which will also cause damage and cracking.

[0039] According to the vibration pattern calculated by simulation mode, it is identified that the gantry frame of the cargo box swings severely left and right along the width of the vehicle body, and the supporting beams on both sides poke up and down on the bottom plate, resulting in the overlap area at the upper and lower ends of the supporting beams being identified as risky locations. When the vehicle is driving on a bumpy road, the torsion of the front and rear wheels of the vehicle will aggravate the structural damage and cracking.

[0040] Therefore, the present application provides an improved cargo box gantry structure and vehicle. The embodiments of the present application are described in detail below. In the present application, unless otherwise specified, front / rear refers to the front-to-rear direction of the vehicle body, inside / outside refers to the width direction of the vehicle body, top / bottom and up / down refers to the height direction of the vehicle body, and the connection between the components is completed by welding.

[0041] like Figures 1 to 4As shown, the present application provides a cargo box type gantry structure, including a rectangular front gantry frame 10 and a rectangular support frame 20. The front gantry frame 10 is surrounded by an upper crossbeam 11, a rectangular tube crossbeam 12 and a pair of rectangular tube vertical beams 13. The support frame 20 is surrounded by a rectangular tube crossbeam 12, a bottom crossbeam 22, and a pair of support vertical beams 21. The pair of support vertical beams 21 are located below the front gantry frame 10 and are respectively connected to the two ends of the rectangular tube crossbeam 12. The bottom crossbeam 22 is located at the bottom of the support vertical beam 21 and connects the pair of support vertical beams 21.

[0042] By setting a bottom cross beam 22 at the bottom of the supporting vertical beam 21, the container-type gantry structure of the present application forms a complete closed frame, effectively preventing the container-type gantry structure from tilting or moving in the width direction of the vehicle body, reducing the impact of external impact on the container-type gantry structure, and increasing the stability and rigidity of the overall structure. At the same time, the setting of the bottom cross beam 22 can optimize the force transmission path of the container-type gantry structure, improve the bearing capacity of the container-type gantry structure, and enhance reliability and safety.

[0043] Please also refer to Figure 5 A plurality of reinforcing beams 14 are arranged at intervals in the front wall gantry frame 10. The reinforcing beam 14 is parallel to the rectangular tube vertical beam 13, and its two ends are respectively connected to the upper cross beam 11 and the rectangular tube cross beam 12. Specifically, the number of the reinforcing beams 14 in this embodiment is three.

[0044] The reinforcing beam 14 is in the shape of a rectangular tube, and its length in the front-to-back direction of the vehicle body is greater than its length in the width direction of the vehicle body. The length of the rectangular tube vertical beam 13 and the supporting vertical beam 21 in the front-to-back direction of the vehicle body is also greater than its length in the width direction of the vehicle body. Such an arrangement can effectively improve the structural strength of the reinforcing beam 14, the rectangular tube vertical beam 13 and the supporting vertical beam 21 in the front-to-back direction of the vehicle body, and effectively reduce the residual concave deformation of the front wall gantry frame 10 caused by the impact of high-center-of-mass cargo in the cargo box.

[0045] The upper cross beam 11 is designed to be bent into a sheet beam that is approximately "L" shaped. The rear side of the upper cross beam 11 is welded to the top of the rectangular tube beam 13 and the reinforcing beam 14, and the front side of the upper cross beam 11 is folded vertically downward and abuts against the front of the rectangular tube beam 13 and the reinforcing beam 14, which can further improve the structural strength of the upper part of the cargo box gantry structure and reduce the bending deformation when the cargo is impacted forward. The upper cross beam 11, rectangular tube cross beam 12, rectangular tube beam 13 and reinforcing beam 14 of the present application are all made of high-strength steel and have excellent structural strength and rigidity.

[0046] like Figure 6 and Figure 7As shown, the supporting beam 21 includes a main body 211, a gusset plate 212 connected to the upper part of the main body 211, and a connecting piece 213 connected to the lower part of the main body 211. The main body 211 is a sheet-like structure approximately in the shape of a "U", including a main board 2111 located on the outside and a pair of flanges 2112 bent inwardly from the front and rear sides of the main board 2111. The main board 2111 and the pair of flanges 2112 enclose a beam cavity 2113.

[0047] The gusset plate 212 is a sheet-like structure approximately in a "U" shape, located in the vertical beam cavity 2113 and buckled with the main body 211. Fig.10 The connector 213 is a tubular structure with a closed bottom. The connector 213 is located in the vertical beam cavity 2113, and a notch 2131 is formed on the upper part of the connector 213 on the side close to the main board 2111. The bottom of the connector 213 extends out of the supporting vertical beam 21 and is welded to the bottom cross beam 22. By arranging the gusset plate 212 and the connector 213 on the upper and lower sides of the supporting vertical beam 21, the structural strength of the supporting vertical beam 21 is improved.

[0048] Please also refer to Figure 8 The upper reinforcement structure 30 is provided at the connection between the bottom of the front gantry frame 10 and the supporting vertical beam 21. The upper reinforcement structure 30 includes an upper reinforcement member 31 and a cover plate 32. The upper reinforcement member 31 is a tubular angle steel, including a first top surface 311, a first bottom surface 312 and a pair of first side surfaces 313. The area of ​​the first top surface 311 is smaller than the area of ​​the first bottom surface 312, and the first side surface 313 is trapezoidal. The openings at both ends of the upper reinforcement member 31 are closed by the front gantry frame 10 and the gusset plate 212 respectively.

[0049] Specifically, in this embodiment, the number of upper reinforcement members 31 is 4. Upper reinforcement members 31 are provided on both the inner and outer sides of each support beam 21, so that the strength of the connection between the support beam 21 and the front gantry frame 10 is improved to the greatest extent. The openings at both ends of the upper reinforcement member 31 located on the inner side of the support beam 21 are respectively closed by the rectangular tube cross beam 12 and the support beam 21, and the openings at both ends of the upper reinforcement member 31 located on the outer side of the support beam 21 are respectively closed by the rectangular tube beam 13 and the support beam 21.

[0050] Each upper reinforcement 31, the supporting vertical beam 21 and the front gantry frame 10 can form an approximately triangular frame, which greatly improves the structural strength of the connection area between the supporting vertical beam 21 and the front gantry frame 10, is not prone to damage and cracking, avoids shaking or deformation of the cargo box gantry structure in the width direction of the vehicle body, enhances its own supporting stiffness, and improves the stability and reliability of the overall structure.

[0051] The cover plate 32 covers the upper part of the upper reinforcement 31 and the support beam 21 from the rear, and its number and shape can be flexibly set according to the number of upper reinforcements 31. In this embodiment, the number of cover plates 32 is 2 and the shape is the same. The shape of the cover plate is an inverted trapezoid, and its long base is equal to the sum of the lengths of the two upper reinforcements 31 and the support beam 21 in the width direction of the vehicle body, its short base is equal to the length of the support beam 21 in the width direction of the vehicle body, and its height is equal to the length of the upper reinforcement 31 in the height direction of the vehicle body. The cover plate 32 is welded to the upper reinforcement 31 and the support beam 21 at the same time, which further reduces the risk of cracking at the connection.

[0052] like Figures 9 to 11 As shown, a lower reinforcement member 40 is provided at the connection between the supporting vertical beam 21 and the bottom cross beam 22. The lower reinforcement member 40 is a tubular angle steel, including a second top surface 41, a second bottom surface 42 and a pair of second side surfaces 43. The area of ​​the second top surface 41 is smaller than that of the second bottom surface 42, and the second side surface 43 is trapezoidal. The openings at both ends of the lower reinforcement member 40 are closed by the bottom cross beam 22 and the supporting vertical beam 21, respectively.

[0053] Furthermore, please combine Fig.12 and Fig.13 The cargo box of the vehicle includes a cargo box bottom plate 70 and frames 80 located on both sides of the cargo box bottom plate 70. The bottom cross beam 22 is located at the bottom of the cargo box bottom plate 70. A rectangular through hole 71 is provided between the cargo box bottom plate 70 and the frame 80. The length of the rectangular through hole 71 in the front-rear direction of the vehicle body is greater than its length in the width direction of the vehicle body, and is used for the support vertical beam 21 to pass through and be welded with the support vertical beam 21. By providing the rectangular through hole 71 between the cargo box bottom plate 70 and the frame 80, the support vertical beam 21, the cargo box bottom plate 70 and the frame 80 can be fixed more firmly and tightly by welding, thereby improving the structural strength of the bottom of the cargo box.

[0054] The connecting piece 213 extends out of the bottom of the rectangular through hole 71 and is welded to the bottom cross beam 22 located at the bottom of the cargo box bottom plate 70. Specifically, the bottom cross beam 22 is a nearly "U"-shaped structure, with both ends closed and the opening facing the rear of the vehicle body. The length of the connecting piece 213 below the cargo box bottom plate 70 is approximately equal to the height of the bottom cross beam 22. The length of the bottom cross beam 22 in the front-to-back direction of the vehicle body is equal to the length of the connecting piece 213 in the front-to-back direction of the vehicle body, and the closed ends of the bottom cross beam 22 are welded to the connecting piece 213.

[0055] Therefore, the lower reinforcement member 40 is actually disposed between the supporting vertical beam 21 and the cargo box bottom plate 70 , and the openings at both ends of the lower reinforcement member 40 are closed by the cargo box bottom plate 70 and the connecting member 213 respectively.

[0056] Specifically, in this embodiment, the number of lower reinforcements 40 is two, and the two lower reinforcements 40 are respectively arranged on the inner side of a pair of supporting vertical beams 21. Each lower reinforcement 40, the supporting vertical beams 21 and the bottom cross beam 22 can form a nearly triangular frame, which greatly improves the structural strength of the connection area between the supporting vertical beams 21 and the bottom cross beam 22 (or the cargo box bottom plate 70), is not easy to be damaged or cracked, and the shaking or deformation of the bottom of the cargo box gantry structure in the width direction of the vehicle body is avoided, and its own support stiffness is enhanced, and the stability and reliability of the overall structure are improved.

[0057] like Fig.13 As shown, the cargo box type gantry structure of the present application further includes a pair of supporting longitudinal beams 50 and a plurality of supporting angle plates 60. The supporting longitudinal beams 50 are fixed to the bottom of the frame 80 and are arranged along the front-rear direction of the vehicle body. The supporting longitudinal beams 50 are located at both ends of the bottom cross beam 22, and the length of the bottom cross beam 22 in the vehicle body width direction is equal to the length of the connecting member 213 in the vehicle body width direction. The supporting longitudinal beam 50 is a nearly "U"-shaped structure, with the opening direction facing the lower part of the vehicle body.

[0058] The support angle plate 60 is in sheet form and is arranged along the width direction of the vehicle body. The support angle plate 60 is overlapped with the support vertical beam 21 and the support longitudinal beam 50 respectively. By arranging the support longitudinal beam 50 and the support angle plate 60, the structural stability and support rigidity of the bottom of the cargo box gantry structure are further strengthened.

[0059] The cargo box of the vehicle further includes a pair of boarding steps 90 connected to the front end of the frame 80. The cargo box gantry structure is arranged close to the boarding steps 90. Specifically, in the front-rear direction of the vehicle body, the supporting longitudinal beam 50 extends from the rear end of the supporting vertical beam 21 to be flush with the rear end of the boarding steps 90.

[0060] There are three supporting angle plates 60 which are parallel to each other. The two ends of the supporting angle plate 60 located in the front are respectively welded to the front end face of the supporting vertical beam 21 and the inner wall of the boarding step 90, the two ends of the supporting angle plate 60 located in the rear are respectively welded to the rear end face of the supporting longitudinal beam 50 and the inner wall of the boarding step 90, and the two ends of the supporting angle plate 60 located in the middle are respectively welded to the main board 2111 and the inner wall of the boarding step 90.

[0061] The present application also discloses a vehicle, comprising a cargo box bottom plate 70, frames 80 located on both sides of the cargo box bottom plate 70, a boarding step 90 connected to the front end of the frame 80, and the above-mentioned cargo box gantry structure. A rectangular through hole 71 is provided between the cargo box bottom plate 70 and the frame 80 for the support beam 21 to pass through, and the length of the rectangular through hole 71 in the front-to-rear direction of the vehicle body is greater than its length in the width direction of the vehicle body. When the vehicle of the present application is designed as a semi-independent cargo box, the cargo box gantry structure is installed on the rear wall of the vehicle body.

[0062] The cargo box gantry structure and vehicle of the present application are provided with a reinforcing structure 30 at the connection between the bottom of the front gantry frame 10 and the supporting upright beam 21, so that the structural strength of the overlap between the front gantry frame 10 and the supporting upright beam 21 is effectively strengthened, and the risk of cracking at the overlap is avoided to a great extent, thereby improving the safety and reliability of the cargo box gantry structure and the vehicle, and can simultaneously achieve the goal of cost reduction and lightweighting, thereby improving the whole vehicle test process.

[0063] The above is only a preferred implementation mode of the present application, and does not constitute any form of limitation to the present application. Although the present application has been disclosed as a preferred implementation mode as above, it is not used to limit the present application. Any technician familiar with this profession can make some changes or modify the technical contents disclosed above into equivalent implementation modes without departing from the scope of the technical solution of the present application. However, any simple modification, equivalent change and modification made to the above implementation modes based on the technical essence of the present application without departing from the content of the technical solution of the present application still fall within the scope of the technical solution of the present application.

Claims

1. A cargo box type gantry structure, characterized in that: It includes a rectangular front gantry frame and a pair of supporting vertical beams, wherein a plurality of reinforcing beams are arranged at intervals in the front gantry frame; the pair of supporting vertical beams are located below the front gantry frame, and an upper reinforcing structure is arranged at the connection between the bottom of the front gantry frame and the supporting vertical beams.

2. The cargo box type gantry structure according to claim 1, characterized in that: The front wall gantry frame comprises an upper crossbeam, a rectangular tube crossbeam and a pair of rectangular tube vertical beams, and the pair of supporting vertical beams are respectively connected to two ends of the rectangular tube crossbeam.

3. The cargo box type gantry structure according to claim 2, characterized in that: The upper reinforcement structure includes an upper reinforcement member, the upper reinforcement member is a tubular angle steel, the upper reinforcement member includes a first top surface, a first bottom surface and a pair of first side surfaces, and the first side surfaces are trapezoidal.

4. The cargo box type gantry structure according to claim 3, characterized in that: The upper reinforcement is provided on both inner and outer sides of each of the supporting beams, and the openings at both ends of the upper reinforcement located on the inner side of the supporting beam are closed by the rectangular tube cross beam and the supporting beam respectively, and the openings at both ends of the upper reinforcement located on the outer side of the supporting beam are closed by the rectangular tube beam and the supporting beam respectively.

5. The cargo box type gantry structure according to claim 3, characterized in that: The upper reinforcement structure also includes a cover plate, which covers the upper reinforcement member and the upper part of the supporting vertical beam from the rear; the length of the reinforcement beam in the front-rear direction of the vehicle body is greater than its length in the width direction of the vehicle body.

6. The cargo box type gantry structure according to claim 1, characterized in that: The supporting vertical beam includes a main body and a buckle plate. The main body includes a main board located on the outside and a pair of flanges bent inward from the front and rear sides of the main board. The main board and the pair of flanges surround a vertical beam cavity. The buckle plate is located at the upper part of the vertical beam cavity and buckled with the main body.

7. The cargo box type gantry structure according to claim 2, characterized in that: It also includes a bottom cross beam located at the bottom of the supporting vertical beam, and the bottom cross beam, the rectangular tube cross beam, and a pair of the supporting vertical beams together form a rectangular supporting frame.

8. The cargo box type gantry structure according to claim 7, characterized in that: A lower reinforcement is provided at the connection between the supporting vertical beam and the bottom cross beam, and the lower reinforcement is a tubular angle steel; the openings at both ends of the lower reinforcement are respectively closed by the bottom cross beam and the supporting vertical beam, and the lower reinforcement is provided on the inner side of the supporting vertical beam.

9. The cargo box type gantry structure according to claim 8, characterized in that: The supporting vertical beam comprises a main body and a connecting piece located in the main body, the connecting piece is a tubular structure with a closed bottom, and the lower reinforcement and the bottom cross beam are both welded to the connecting piece.

10. The cargo box type gantry structure according to claim 7, characterized in that: It also includes a pair of supporting longitudinal beams arranged along the front-rear direction of the vehicle body and a plurality of sheet-like supporting angle plates arranged along the width direction of the vehicle body. The supporting longitudinal beams are located at both ends of the bottom cross beam; the supporting angle plates are overlapped with the supporting vertical beams and the supporting longitudinal beams respectively.

11. A vehicle, characterized in that: It includes a cargo box floor, frames located on both sides of the cargo box floor, a boarding step connected to the front end of the frame, and a cargo box gantry structure as described in any one of claims 1 to 10, wherein the cargo box gantry structure is installed on the rear periphery of the vehicle body, and a rectangular through hole is opened between the cargo box floor and the frame for the support vertical beam to pass through, and the length of the rectangular through hole in the front-to-rear direction of the vehicle body is greater than its length in the width direction of the vehicle body.

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