Double-layer container car

Abstract

The invention discloses a double-layer container car which comprises a concave bottom frame, two side walls and two end bottom frames, one end bottom frame is located at one end of the concave bottom frame, and the other end bottom frame is located at the other end of the concave bottom frame. The two side walls are oppositely arranged on the two sides of the two end bottom frames and the two sides of the concave bottom frame to form a box body structure. The concave bottom frame comprises two lower side beams and a plurality of cross beams; the side wall comprises an upper side beam, a wall plate, a plurality of stand columns and a reinforcing plate, the upper side beam and the lower side beam are oppositely arranged, and the wall plate is connected with the upper side beam and the lower side beam; the multiple stand columns are arranged on the outer side wall of the wallboard in the length direction and connected with the upper side beam and the lower side beam. The reinforcing plates are in lap joint with the outer side walls of the wallboards and form closed box-shaped structures with the corresponding stand columns; and the reinforcing plate is directly or indirectly connected with the lower side beam. The vertical load of the vehicle body can be directly transmitted to the reinforcing plates, the stand columns and the upper side beams from the lower side beams. The overall connection rigidity of the vehicle body is improved, the concave deformation of the concave underframe is reduced, and the running safety of the vehicle is improved.

Description

Technical Field

[0001] This disclosure relates to the field of double-stack container truck technology, and more specifically, to a double-stack container truck. Background Technology

[0002] Container shipping is an advanced mode of transportation, boasting advantages such as high efficiency, low cost, convenient intermodal transport, minimal cargo damage, and door-to-door service. It is a major mode of modern logistics and multimodal transport and has been widely adopted by countries worldwide. Double-stack container shipping, by fully utilizing the extended upper and lower limits of railway tracks, allows for the transport of two layers of containers, increasing railway transport capacity and reducing costs. Currently, the lower side beams of the concave underframe of double-stack container cars are welded from two cold-formed steel sections, with bends at the container load-bearing locations. These bends are forged, resulting in a complex structure and high manufacturing costs.

[0003] Therefore, reducing the manufacturing cost of double-stack container trucks has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] In view of this, the purpose of this disclosure is to provide a double-stack container truck to reduce the manufacturing cost of double-stack container trucks.

[0005] To achieve the above objectives, this disclosure provides the following technical solution:

[0006] A double-decker container truck includes a recessed underframe, two side walls, and two end underframes. One end underframe is located at one end of the recessed underframe, and the other end underframe is located at the other end of the recessed underframe. The two side walls are arranged opposite to each other on both sides of the two end underframes and the recessed underframe to form a box structure. The recessed underframe includes two lower side beams and multiple crossbeams. The two lower side beams are arranged opposite to each other and connected by the multiple crossbeams. The side walls include upper side beams, wall panels, multiple columns, and reinforcing plates. The upper side beams are arranged opposite to the lower side beams, and the wall panels connect the upper side beams and the lower side beams. The multiple columns are arranged along the length of the outer side wall of the wall panels and connect the upper side beams and the lower side beams. The reinforcing plates overlap the outer side wall of the wall panels and form a closed box structure with the corresponding columns. The reinforcing plates are directly or indirectly connected to the lower side beams.

[0007] In some embodiments, the lower side beam is a single piece of cold-formed steel with an L-shaped structure. The first part of the lower side beam is connected to the side wall, and the second part of the lower side beam is connected to the crossbeam.

[0008] In some embodiments, among the multiple crossbeams, the crossbeams at both ends include protrusions that are connected to the traction beams of the end base frame; and / or

[0009] Among the multiple crossbeams, the crossbeams at both ends are equipped with lock plates for locking the container; and / or

[0010] Among the multiple crossbeams, the middle crossbeam is equipped with a locking plate for securing the container.

[0011] In some embodiments, the recessed base also includes a guide plate, which is a separate structure from the locking plate.

[0012] In some embodiments, the sidewall further includes an end connecting beam and an end cover plate, wherein the end connecting beam connects a first and a second column located at the end of a plurality of columns; and the end cover plate is disposed on the end face of the end connecting beam.

[0013] In some embodiments, the sidewall also includes a reinforcing plate that overlaps the wall panel and is corner-jointed with the upper and lower side beams. The reinforcing plate is welded to the column to form a box-shaped structure.

[0014] In some embodiments, a reinforcing plate is provided on the central column among a plurality of columns, and the wall with the reinforcing plate is provided with a notch so that the guide plate of the recessed base frame is directly welded to the reinforcing plate.

[0015] In some embodiments, among the plurality of columns, the cross-sectional area of ​​the first and second columns located at the ends, and the third column located in the middle, is greater than the cross-sectional area of ​​the remaining columns; and / or

[0016] Among the multiple columns, the first and second columns located at the ends, and the third column located in the middle, have a plate thickness greater than that of the remaining columns.

[0017] In some embodiments, the end frame includes side beams, end beams, traction beams, bolster beams, and a floor, wherein the side beams are connected to the end connecting beams of the side walls along their length; the end beams connect the two side beams to form a support frame with the side beams; the traction beams and bolster beams are located below the support frame, and the traction beams are connected to the crossbeams of the recessed frame along their length; the bolster beams connect the traction beams and the end connecting beams of the side walls along their width to form a cross-shaped structure; and the floor is located above and connected to the support frame.

[0018] In some embodiments, the end frame also includes a rear end plate, which is welded to the traction beam, side wall and recessed base frame, and the rear end plate has a certain slope to guide the container.

[0019] In some embodiments, the end frame includes an upper connecting beam that connects in the width direction to columns on two oppositely arranged side walls; and / or

[0020] The end frame includes a lower connecting beam located below the floor and connected in the width direction to columns of two oppositely arranged side walls.

[0021] As can be seen from the above examples, in the examples of this disclosure, the vertical load of the vehicle body can be directly transferred from the lower side beam to the reinforcing plate, column, and upper side beam. This improves the overall connection rigidity of the vehicle body, reduces the amount of concave deformation of the underframe, and improves the vehicle's operational safety.

[0022] The technical features mentioned above, those to be mentioned below, and those shown individually in the accompanying drawings can be combined arbitrarily, provided that the combined technical features are not contradictory. All feasible combinations of features are the technical content explicitly described herein. Any one of the multiple sub-features contained in the same statement can be applied independently, without necessarily being applied together with other sub-features. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1 A top perspective view of a double-stack container truck provided for an embodiment of this disclosure;

[0025] Figure 2 A top view of a double-stack container truck provided in an embodiment of this disclosure;

[0026] Figure 3 A front view of a double-stack container truck provided in an embodiment of this disclosure;

[0027] Figure 4 A perspective view of the recessed base provided in an embodiment of this disclosure;

[0028] Figure 5 A front view of the sidewall provided in an embodiment of this disclosure;

[0029] Figure 6 Rear view of the sidewall provided for an embodiment of this disclosure;

[0030] Figure 7 A diagram showing the connection relationship between the central column and the crossbeam provided in this embodiment of the disclosure;

[0031] Figure 8 for Figure 7 A magnified view of a portion of the image;

[0032] Figure 9 for Figure 8 Enlarged view of section A;

[0033] Figure 10A partial enlarged view of a double-stack container truck provided in an embodiment of this disclosure;

[0034] Figure 11 A partial enlarged view of a double-stack container truck provided in an embodiment of this disclosure;

[0035] Figure 12 A top view of a double-stack container truck provided in an embodiment of this disclosure;

[0036] Figure 13 A perspective view of a double-stack container truck equipped with a power supply box and a braking system, provided for embodiments of this disclosure;

[0037] Among them, 10-recessed base frame; 20-side wall; 30-end base frame; 40-power supply box; 50-braking system;

[0038] 11-Lower side beam; 12-Crossbeam; 13-Lock seat plate; 14-Guide plate; 12a-First crossbeam; 12b-Second crossbeam;

[0039] 21-Upper side beam; 22-Wall panel; 23-Column; 24-End connecting beam; 25-End cover plate; 26-Reinforcing plate; 27-Notch; 23a-First column; 23b-Second column; 23c-Third column;

[0040] 31-Side beam; 32-End beam; 33-Floor; 34-Upper connecting beam; 35-Traction beam; 36-Sleeper beam; 37-Rear end plate; 38-Lower connecting beam; 39-Container lock. Detailed Implementation

[0041] The core of this disclosure is to provide a double-decker container truck that reduces the difficulty of unloading while minimizing cement buildup in the middle.

[0042] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this disclosure.

[0043] like Figures 1 to 4 ,as well as Figure 8 and Figure 9As shown, the double-decker container truck of this disclosure includes a recessed underframe 10, two side walls 20, and two end underframes 30. One end underframe 30 is located at one end of the recessed underframe 10, and the other end underframe 30 is located at the other end of the recessed underframe 10. The two side walls 20 are arranged opposite to each other on both sides of the two end underframes 30 and the recessed underframe 10 to form a container structure. The recessed underframe 10 includes two lower side beams 11 and a plurality of crossbeams 12. The two lower side beams 11 are arranged opposite to each other and are connected by the plurality of crossbeams 12. The side wall 20 includes an upper side beam 21, a wall panel 22, multiple columns 23, and a reinforcing plate 26. The upper side beam 21 is arranged opposite to the lower side beam 11, and the wall panel 22 connects the upper side beam 21 and the lower side beam 11. The multiple columns 23 are arranged along the length of the outer side wall of the wall panel 22 and connect the upper side beam 21 and the lower side beam 11. The reinforcing plate 26 overlaps the outer side wall of the wall panel 22 and forms a closed box structure with the corresponding column 23. The reinforcing plate 26 is directly or indirectly connected to the lower side beam 11. In the example above, the vertical load of the vehicle body can be directly transferred from the lower side beam 11 to the reinforcing plate 26, columns 23, and upper side beam 21. This improves the overall connection stiffness of the vehicle body, reduces the concave deformation of the recessed underframe 10, and improves the safety of vehicle operation.

[0044] In some examples, to simplify the structure of the recessed underframe 10, the lower side beam 11 is a single piece of cold-formed steel with an L-shaped structure. The first part of the lower side beam 11 is connected to the side wall 20, and the second part of the lower side beam 11 is connected to the crossbeam 12. In the double-stack container truck of this disclosure, the lower side beam 11 of the recessed underframe 10 is a single piece of cold-formed steel with an L-shaped structure, thus reducing the application of bends and thereby reducing the manufacturing cost of the double-stack container truck.

[0045] See Figure 4 The crossbeam 12 includes a cover plate and a channel beam. The cover plate covers the opening of the channel beam, and the two ends of the cover plate are respectively connected to the corresponding lower beam 11.

[0046] Among the multiple crossbeams 12, the crossbeams 12 located at both ends (first crossbeams 12a) include protrusions that are connected to the traction beams 35 of the end base frame 30. The protrusions of the first crossbeams 12a are located in the middle and protrude from the middle of the first crossbeams 12a toward the end base frame 30.

[0047] To improve the connection strength of the containers, locking plates for locking the containers are arranged on the crossbeams 12 at both ends. Arranging locking plates on the crossbeams 12 at both ends enables the loading of containers with a length equivalent to that of the recessed frame 10.

[0048] To improve the versatility of this double-stack container truck, a locking plate for locking containers is arranged on the middle crossbeam 12 among the multiple crossbeams 12. The locking plate in the middle, together with the locking plates at the ends, enables the loading of two containers, the overall length of which is adapted to the length of the recessed undercarriage 10.

[0049] In order to improve the loading speed of the container, the recessed base frame 10 may also include a guide plate. The guide plate is arranged at an angle relative to the recessed base frame 10, so that the hoisted container can be guided to a set position, such as the position of the lock seat plate, so as to quickly complete the locking position of the container and the alignment of the lock seat plate.

[0050] In some examples, the guide plate and lock seat plate are integrated into a single module for quick installation. In other examples, the guide plate and lock seat plate are separate structures, which simplifies the final product and reduces production and manufacturing costs.

[0051] The structure of the recessed base 10 has been described above. This disclosure also includes some examples illustrating the structure of the sidewall 20. See [link to relevant documentation]. Figures 5 to 6 The side wall 20 includes an upper beam 21, multiple columns 23, a wall panel 22, an end connecting beam 24, and an end cover plate 25. The upper beam 21 and the lower beam 11 are arranged opposite each other in the height direction. The wall panel 22 connects the upper beam 21 and the lower beam 11. The multiple columns 23 are arranged sequentially along the length direction on the outer side wall of the wall panel 22 and connect the upper beam 21 and the lower beam 11. The end connecting beam 24 connects the first column 23a and the second column 23b located at the end of the multiple columns 23. The end cover plate 25 is arranged on the end face of the end connecting beam 24.

[0052] It should be noted that, in order to reduce the weight of the vehicle body, in some examples disclosed herein, the wall panel 22 is made of steel plates of different thicknesses spliced ​​together, with thicker plates used at the ends where the load-bearing requirements are high, and thinner plates used in the middle. In some examples, the upper beam 21 is a rectangular steel section that overlaps with the wall panel 22; in other examples, the upper beam 21 is a channel-shaped structure that corners with the wall panel 22 to form a rectangular structure. The end connecting beam 24 is an L-shaped structure that is welded to the first end column 23a, the second end column 23b, the wall panel 22, and the end lower cover plate.

[0053] Each column 23 is a channel-shaped structure. The plate thickness and cross-section of each column 23 are rationally designed according to the different load-bearing functions of different parts of the side wall 20. The third column 23c in the middle and the second column 23b bear the vertical load of the container, while the first column 23a bears various loads transmitted from the bolster beam 36 (described later). Therefore, these three columns 23 have large cross-sections and are thick plates. The main function of the remaining columns 23 is to connect the upper side beam 21 and the lower side beam 11 and stabilize the wall panel 22; their structural strength requirements are relatively low. Among the multiple columns 23, the cross-sectional area of ​​the first column 23a and the second column 23b at the ends, and the third column 23c in the middle, is larger than that of the remaining columns 23; the plate thickness of the first column 23a and the second column 23b at the ends, and the third column 23c in the middle, is greater than that of the remaining columns 23.

[0054] The first column 23a is corner-welded to the lower cover plate of the bolster beam 36 for connecting the bolster beam 36 and the side wall 20. An elongated hole is provided on the outer side of the first column 23a as a lifting hole for vehicle lifting. Elongated holes are provided on the upper part of both sides of each column 23 for the arrangement of brake lines.

[0055] The connection between the side wall 20 structure and the end frame 30 described above is simple. Furthermore, the built-in structure of the side wall 20 facilitates the assembly of the vehicle's brake piping system, allowing the brake pipes to be installed directly through each pillar 23 from outside the vehicle.

[0056] To improve load-bearing capacity, the reinforcing plates 26 of the aforementioned side walls 20 can be directly or indirectly connected to the lower side beams 11. Furthermore, multiple columns 23 can all be equipped with reinforcing plates 26, or in some examples, the central column 23 among the multiple columns 23 may have a reinforcing plate 26. This not only provides specificity but also reduces costs. The reinforcing plates 26 overlap the wall panels 22 and are corner-jointed with the upper side beams 21 and the lower side beams 11. The reinforcing plates 26 are welded to the columns 23 to form a box-shaped structure, such as... Figures 7 to 9 As shown.

[0057] The double-stack container car maximizes the use of the upper and lower limits of railway vehicles, with the lower cover plate of the crossbeam 12 in the middle of the recessed underframe 10 being the lowest point of the car body. For example, when the car is loaded with a 20ft container, the locking plate in the middle of the recessed underframe 10 bears the container load, causing a concave deformation in the middle of the car body. The vertical load on the middle of the car body is greatest when two 20ft containers are loaded on the lower and two on the upper levels. To improve vehicle operating safety and reduce the concave deformation in the middle of the car body, the connection strength in the middle of the car body needs to be increased. To specifically address the above problems, the aforementioned reinforcing plate 26 can be installed in the middle of the multiple uprights 23, corresponding to the middle crossbeam 12 in the multiple crossbeams 12. The reinforcing plate 26 overlaps with the side wall 20, intersects with the upper side beam 21 and lower side beam 11, and is welded to the upright 23 to form a closed box-shaped structure. The wall panel 22 corresponding to the central column 23 has a notch, through which the guide plate 14 can be welded to the reinforcing plate 26. Since the reinforcing plate 26 is directly welded to the guide plate 14 in the central part of the recessed base frame 10, the vertical load of the vehicle body can be directly transferred from the lock seat plate and guide plate 14 to the reinforcing plate 26, column 23, and upper side beam 21. This improves the overall connection rigidity of the vehicle body, reduces the amount of concave deformation in the central part of the recessed base frame 10, and enhances vehicle operation safety.

[0058] The above describes the side wall 20 in this disclosure. The following section will focus on the end base frame 30. (See also...) Figure 10 and Figure 11 The end frame 30 includes side beams 31, end beams 32, traction beams 35, bolster beams 36, and a floor 33. The side beams 31 are connected along their length to the end connecting beams 24 of the side wall 20. The end beams 32 connect two side beams 31 to form a support frame. The rear end plate connects the side wall 20 and the recessed base frame 10. The traction beams 35 and bolster beams 36 are located below the support frame, and the traction beams 35 are connected along their length to the crossbeams 12 of the recessed base frame 10. The bolster beams 36 connect the traction beams 35 and the end connecting beams 24 of the side wall 20 in the width direction, forming a cross-shaped structure. The floor 33 is located above and connected to the support frame. Since neither the traction beams 35 nor the bolster beams 36 have separate top covers, the floor 33 is used as the overall top cover, simplifying the vehicle structure and reducing the vehicle's weight.

[0059] To improve the connection strength, the end frame 30 may also include an intermediate beam, which is used to connect the side beam 31 and the end beam 32 from the width direction or the length direction, so as to improve the rigidity of the connection.

[0060] The end frame 30 also includes a rear end plate 37, which is welded to the traction beam 35, the side wall 20 and the recessed frame 10, and the rear end plate has a slope to guide the container.

[0061] In the diagram, the end frame 30 includes an upper connecting beam 34, which connects to the columns 23 of two oppositely arranged side walls 20 in the width direction. The traditional upper support beam and longitudinal upper connecting beam on the floor 33 of the end frame 30 are eliminated. Instead, to improve the end frame 30's ability to withstand vertical and longitudinal loads, a traction beam 35 is connected to the rear end plate 37 and the base plate of the recessed frame 10, and an upper connecting beam 34 is added to enhance the overall connection strength of the traction beam 35, the floor 33, and the side walls 20.

[0062] In addition, the end base frame 30 includes a lower connecting beam 38, which connects in the width direction to the columns 23 of the two oppositely arranged side walls 20. The upper pillow beam and longitudinal upper connecting beam traditionally provided on the floor 33 of the end base frame 30 are eliminated. In this case, to improve the end base frame 30's ability to withstand vertical and longitudinal loads, the traction beam 35 is connected to the rear end plate 37 and the floor 33 of the recessed base frame 10, and the lower connecting beam 38 is added to improve the overall connection strength of the traction beam 35, the floor 33, and the side walls 20.

[0063] The traction beam 35 consists of a web, a lower cover plate, a core plate, and an impact seat. The bolster beam 36 consists of a lower cover plate and a web. The end beam 32 and the longitudinal beam are channel beams or square steel. The lower upper connecting beam 34 is an L-shaped plate, and the upper upper connecting beam 34 is a welded channel beam or a cold-formed channel beam.

[0064] One end of the bolster beam 36 connects to the traction beam 35, and the other end connects to the lower cover plate at the end of the side wall 20, allowing for more direct load transfer and improving the fatigue strength of the connecting welds. Furthermore, the longitudinal load of the vehicle body can be transferred through two paths: one via the traction beam 35 to the rear end plate and the recessed underframe 10, and the other via the traction beam 35 and bolster beam 36 to the side wall 20. This design of two longitudinal load transfer paths reduces the stress on components such as the traction beam 35, bolster beam 36, and the lower cover plate at the end of the side wall 20, significantly improving the structural strength of the vehicle body.

[0065] See Figure 12 and Figure 13 The upper surface of the end frame 30 is only provided with a floor 33, leaving room for the installation of other large components (such as the power supply box 40 of the refrigerated container, the braking system 50, etc.). The empty floor 33 serves as a safety platform for workers to pass through. Four container locks 39 are installed on the floor 33 of the end frame 30 on the right side of the vehicle body to fix the power supply box 40 and provide power to the refrigerated container when the vehicle is transporting the refrigerated container.

[0066] In summary, the double-stack container truck of this disclosure adopts a lightweight design for the end underframe 30, recessed underframe 10, and sidewalls 20 under increased load capacity. By optimizing the load transfer path, the number of parts can be reduced, the vehicle body weight can be lowered, and the assembly processability of the vehicle body can be improved. In addition, the connection structure between the sidewalls 20 and the recessed underframe 10 is reasonably designed to improve the connection rigidity of the middle part of the vehicle body while meeting the requirements of lightweighting of the sidewalls 20 and the recessed underframe 10.

[0067] The terms "first" and "second," etc., in this disclosure, claims, and the foregoing drawings are used to distinguish different objects and not to describe a particular order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units may not be defined in the listed steps or units, but may include steps or units not listed.

[0068] The above description of the disclosed embodiments enables those skilled in the art to make or use this disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A double-deck container car, characterized by, The structure includes a recessed base frame, two side walls, and two end base frames. One end base frame is located at one end of the recessed base frame, and the other end base frame is located at the other end of the recessed base frame. The two side walls are arranged opposite to each other on both sides of the two end base frames and the recessed base frame to form a box structure. The recessed base frame includes two lower side beams and multiple cross beams. The two lower side beams are arranged opposite to each other and connected by the multiple cross beams. The side wall includes an upper side beam, a wall panel, multiple columns, and a reinforcing plate. The upper side beam and the lower side beam are arranged opposite each other, and the wall panel connects the upper side beam and the lower side beam. The multiple columns are arranged along the length direction on the outer side wall of the wall panel and connect the upper side beam and the lower side beam. The reinforcing plate overlaps the outer side wall of the wall panel and forms a closed box structure with the corresponding column. The reinforcing plate is directly or indirectly connected to the lower side beam.

2. The double-stack container truck as described in claim 1, characterized in that, The lower side beam is a single piece of cold-formed steel with an L-shaped structure. The first part of the lower side beam is connected to the side wall, and the second part of the lower side beam is connected to the crossbeam.

3. The double-stack container truck as described in claim 1, characterized in that, Of the plurality of crossbeams, the crossbeams located at both ends include protrusions that are connected to the traction beams of the end base frame; and / or Of the plurality of beams, the beams at both ends are provided with lock seats for locking containers; and / or Of the plurality of beams, the beam located in the middle is provided with a locking plate for locking the container.

4. The double-stack container truck as described in claim 3, characterized in that, The recessed base also includes a guide plate, which is a separate structure from the locking plate.

5. The double-stack container truck as described in claim 1, characterized in that, The side wall also includes an end connecting beam and an end cover plate, wherein the end connecting beam connects the first and second columns located at the ends of the plurality of columns; the end cover plate is arranged on the end face of the end connecting beam.

6. The double-stack container truck as described in claim 5, characterized in that, The reinforcing plate is installed on the central column among the multiple columns, and the wall with the reinforcing plate has a notch so that the guide plate of the recessed base frame can be directly welded to the reinforcing plate.

7. The double-stack container truck as described in claim 5, characterized in that, Of the plurality of columns, the first and second columns located at the ends, and the third column located in the middle, have a cross-sectional area larger than that of the remaining columns; and / or Of the plurality of columns, the first and second columns located at the ends, and the third column located in the middle, have a plate thickness greater than that of the remaining columns.

8. The double-stack container truck as described in claim 1, characterized in that, The end frame includes side beams, end beams, traction beams, bolster beams, and a floor. The side beams are connected to the end connecting beams of the side walls along their length. The end beams connect two side beams to form a support frame. The traction beams and bolster beams are located below the support frame, and the traction beams are connected to the crossbeams of the recessed frame along their length. The bolster beams connect the traction beams to the end connecting beams of the side walls along their width to form a cross-shaped structure. The floor is located above and connected to the support frame.

9. The double-stack container truck as described in claim 8, characterized in that, The end frame also includes a rear end plate, which is welded to the traction beam, the side wall and the recessed base frame, and the rear end plate has a slope to guide the container.

10. The double-stack container truck as described in claim 9, characterized in that, The end frame includes an upper connecting beam located above the floor and connected in the width direction to columns of two oppositely arranged side walls; and / or The end frame includes a lower connecting beam located below the floor and connected in the width direction to columns of two oppositely arranged side walls.

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