Underframe assembly and container

Abstract

The utility model discloses an underframe assembly and a container. The underframe assembly comprises a doorsill beam, a doorsill beam reinforcing plate, a first bottom cross beam and a connecting reinforcing plate, the doorsill beam is located at the rear end of the underframe assembly. The doorsill beam reinforcing plate is arranged in the doorsill beam and is vertically and fixedly connected with the doorsill beam; the first bottom cross beam is adjacent to the doorsill beam in the front-back direction of the underframe assembly; the first end of the connecting reinforcing plate is fixedly connected with the doorsill beam reinforcing plate, and the second end of the connecting reinforcing plate is fixedly connected with the first bottom cross beam close to the doorsill beam. According to the chassis assembly, the structure at the doorsill beam is reinforced, so that the bearing strength of the doorsill beam is improved, the impact on the doorsill part during frequent loading and unloading of goods can be effectively resisted, and the deformation degree of the bottom of the rear end of the container is reduced.

Description

Technical Field

[0001] The utility model generally relates to the technical field of cargo boxes and containers, and more specifically relates to a chassis assembly and a container. Background Art

[0002] Containers can load packed or unpacked goods for sea, land and air transportation. Container transportation is an important transportation mode in the multimodal transportation process of international trade goods. During transit, the goods inside the container do not need to be moved. The container can be used as a transportation unit for rapid loading and unloading, is convenient for loading and unloading with mechanical equipment, and can be reused repeatedly for a long time. Freight transportation through containers can greatly improve transportation efficiency and reduce transportation costs.

[0003] A door is provided at the rear end of a common container, and a sill beam is correspondingly provided on the chassis assembly. Since a forklift needs to enter and exit the container when loading and unloading goods through the door, the sill beam frequently bears the impact of goods and the forklift. After long-term use, the bottom of the rear end of the container is prone to serious deformation, reducing the structural strength of the container and affecting the transportation safety of the container.

[0004] Therefore, it is necessary to provide a chassis assembly and a container to at least partially solve the above problems. Summary of the Utility Model

[0005] A series of simplified concepts are introduced in the summary of the utility model, which will be further described in detail in the detailed implementation section. The summary of the utility model does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the protection scope of the claimed technical solution.

[0006] To at least partially solve the above problems, a first aspect of the utility model provides a chassis assembly for a container, and the chassis assembly includes:

[0007] A sill beam, which is located at the rear end of the chassis assembly;

[0008] A sill beam reinforcement plate, which is arranged inside the sill beam and is fixedly connected to the sill beam perpendicularly;

[0009] At least one first bottom cross beam, along the front-rear direction of the chassis assembly, at least one of the first bottom cross beams is adjacent to the sill beam;

[0010] A connection reinforcement plate, the first end of the connection reinforcement plate is fixedly connected to the sill beam reinforcement plate, and the second end of the connection reinforcement plate is fixedly connected to the first bottom cross beam close to the sill beam.

[0011] Optionally, the sill beam is a semi-enclosed structure, forming a notch on the side facing the first bottom cross beam;

[0012] The connecting reinforcement plate is fixedly connected to the sill beam reinforcement plate through the notch.

[0013] Optionally, the sill beam includes: a top plate, a bottom plate, a first side plate, and a second side plate;

[0014] Wherein, the top plate is vertically above the bottom plate and is spaced from the bottom plate by a predetermined distance;

[0015] Both ends of the first side plate are respectively connected to one end of the top plate and the bottom plate at the rear side of the sill beam;

[0016] One end of the second side plate is connected to the end of the top plate far from the first side plate, the other end of the second side plate extends towards the bottom plate, and the extension length of the second side plate is less than that of the first side plate;

[0017] The bottom plate extends in the direction pointing to the front side of the sill beam, and the extension length is less than that of the top plate, so as to form the notch between one end of the bottom plate far from the first side plate and one end of the second side plate far from the top plate.

[0018] Optionally, the sill beam includes a top plate facing the container door, and a slope gradually decreasing towards the rear side of the sill beam is provided on the upper surface of the top plate to form a gap with the container door;

[0019] The slope occupies all or part of the top plate.

[0020] Optionally, a plurality of sill beam reinforcement plates are arranged inside the sill beam, and the plurality of sill beam reinforcement plates are arranged near the middle of the sill beam.

[0021] Optionally, the cross-sectional shape of the first bottom cross beam is L-shaped.

[0022] Optionally, the underframe assembly further includes:

[0023] A fork slot for accommodating the forklift forks;

[0024] The fork slot includes a top wall, a first side wall, and a second side wall, and L-shaped bending structures facing the outside of the fork slot are provided at one end of the first side wall and the second side wall far from the top wall.

[0025] Optionally, the fork slot is integrally bent and formed.

[0026] Optionally, the underframe assembly further includes:

[0027] The second bottom crossbeam, along the front - rear direction of the chassis assembly, is adjacent to the fork slot. The cross - sectional shape of the second bottom crossbeam is Z - shaped, and a bending structure deviating from the fork slot is formed at one end of the second bottom crossbeam away from the top wall, so as to form an operation space between the second bottom crossbeam and the fork slot.

[0028] Optionally, the chassis assembly further includes:

[0029] A front sill beam, which is located at the front end of the chassis assembly;

[0030] A steel floor, and both ends of the steel floor are respectively arranged on the sill beam and the front sill beam;

[0031] The steel floor includes multiple floor units, and adjacent floor units are connected by welding.

[0032] Optionally, the chassis assembly further includes:

[0033] At least one second bottom crossbeam and at least one third bottom crossbeam;

[0034] The first bottom crossbeam, the second bottom crossbeam, and the third bottom crossbeam are arranged at intervals along the front - rear direction of the chassis assembly, and are all connected below the steel floor;

[0035] Wherein, the cross - sectional shape of the second bottom crossbeam is Z - shaped, and the cross - sectional shape of the third bottom crossbeam is C - shaped;

[0036] The top of the second bottom crossbeam and / or the top of the third bottom crossbeam are located at the welds of adjacent floor units, and the second bottom crossbeam and / or the third bottom crossbeam are welded to the steel floor.

[0037] The second aspect of the present utility model provides a container, including: the chassis assembly according to any one of the above - mentioned technical solutions.

[0038] According to a chassis assembly and a container of the present utility model, by strengthening the structure at the sill beam, the load - bearing strength of the sill beam is improved, which can effectively resist the impact on the sill part during frequent loading and unloading of goods, significantly improve the structural strength of the chassis assembly, reduce the deformation degree of the bottom of the rear end of the container, extend the service life of the container, and ensure the transportation safety of the container. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The following drawings of the embodiments of the present utility model are here as a part of the present utility model for understanding the present utility model. The embodiments and descriptions thereof shown in the drawings are used to explain the principles of the present utility model. In the drawings,

[0040] Figure 1Half-sectional top view of a container according to a preferred embodiment of the present utility model;

[0041] Figure 2 Front sectional view of the underframe assembly according to a preferred embodiment of the present utility model;

[0042] Figure 3 Left sectional view of the underframe assembly according to a preferred embodiment of the present utility model;

[0043] Figure 4 Sectional view of the sill beam according to a preferred embodiment of the present utility model;

[0044] Figure 5 Sectional view of the fork slot according to a preferred embodiment of the present utility model.

[0045] Description of reference numerals:

[0046] 100: Container 1: First bottom side beam

[0047] 2: First bottom cross beam 3: Third bottom cross beam

[0048] 4: Second bottom cross beam 5: Fork slot

[0049] 51: Top wall 52: First side wall

[0050] 53: Second side wall 6: Steel floor

[0051] 7: Sill beam 71: Top plate

[0052] 72: Ramp 73: First side plate

[0053] 74: Second side plate 75: Bottom plate

[0054] 76: Notch 8: Connecting and strengthening plate

[0055] 9: Front sill beam 10: Sill beam strengthening plate

[0056] 11: Second bottom side beam 20: Underframe assembly Detailed implementation manners

[0057] In the following description, numerous specific details are given to provide a more thorough understanding of the present utility model. However, it is obvious to those skilled in the art that the present utility model can be implemented without one or more of these details. In other instances, some well-known technical features are not described to avoid confusion with the present utility model.

[0058] To thoroughly understand the present utility model, a detailed description will be presented in the following. It should be understood that these embodiments are provided to make the disclosure of the present utility model thorough and complete, and to fully convey the concept of these exemplary embodiments to those of ordinary skill in the art. Obviously, the implementation of the embodiments of the present utility model is not limited to the specific details familiar to those skilled in the art. The preferred embodiments of the present utility model are described in detail below. However, in addition to these detailed descriptions, the present utility model may also have other embodiments.

[0059] Ordinal numbers such as "first" and "second" cited in the present utility model are merely identifiers and do not have any other meanings, such as a specific order, etc. Moreover, for example, the term "first component" itself does not imply the existence of a "second component", and the term "second component" itself does not imply the existence of a "first component".

[0060] It should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer" and similar expressions used in the present utility model are for illustrative purposes only and are not restrictive.

[0061] The present utility model discloses a chassis assembly 20 and a container 100.

[0062] Now, exemplary embodiments according to the present utility model will be described in more detail with reference to the accompanying drawings.

[0063] As Figure 1 、 Figure 2 、 Figure 3 shown, in a preferred embodiment, the chassis assembly 20 of the present application is for a container, and the chassis assembly 20 includes: a sill beam 7, a sill beam reinforcement plate 10, a first bottom cross beam 2, and a connection reinforcement plate 8;

[0064] The sill beam 7 is located at the rear end of the chassis assembly 20; the front-rear direction of the chassis assembly 20 is consistent with the front-rear direction of the container, the rear end of the chassis assembly 20 is located below the container door, and the front end of the chassis assembly 20 is located below the closed end of the container;

[0065] The sill beam reinforcement plate 10 is disposed inside the sill beam 7 and is fixedly connected perpendicular to the sill beam 7, and can be fixedly connected by welding;

[0066] At least one first bottom cross beam 2 can be provided, and multiple can be provided. Along the front-rear direction of the chassis assembly 20, at least one first bottom cross beam 2 is adjacent to the sill beam 7, and the first bottom cross beam 2 is arranged parallel to the sill beam 7;

[0067] The first end of the connection reinforcement plate 8 is fixedly connected to the sill beam reinforcement plate 10, and the second end of the connection reinforcement plate 8 is fixedly connected to the first bottom cross beam 2 close to the sill beam 7, and can be fixedly connected by welding.

[0068] In this embodiment, the chassis assembly improves the load-bearing strength of the sill beam by strengthening the structure at the sill beam, can effectively resist the impact on the sill part during frequent loading and unloading of goods, significantly improves the structural strength of the chassis assembly, reduces the deformation degree of the bottom end of the container, extends the service life of the container, and ensures the transportation safety of the container.

[0069] In one embodiment, as Figure 2 , Figure 4 shown, the sill beam 7 is a semi-enclosed structure, forming a notch 76 on the side facing the first bottom cross beam 2;

[0070] The connecting reinforcing plate 8 is fixedly connected to the sill beam reinforcing plate 10 through the notch 76.

[0071] The cross-sectional shape of the sill beam 7 is similar to a rectangle with a corner missing, so the sill beam reinforcing plate 10 can be set as a matching trapezoidal structure, and the connecting reinforcing plate 8 can be set as a rectangle with a corner missing. The first end of the missing corner is convenient to extend into the interior of the sill beam 7 through the notch 76 and is fixedly connected to the sill beam reinforcing plate 10, and can be fixedly connected by welding.

[0072] In one embodiment, as Figure 4 shown, the sill beam 7 includes: a top plate 71, a bottom plate 75, a first side plate 73, and a second side plate 74;

[0073] Among them, the top plate 71 is vertically above the bottom plate 75 and is spaced from the bottom plate 75 by a predetermined distance;

[0074] Both ends of the first side plate 73 are respectively connected to one end of the top plate 71 and the bottom plate 75 at the rear side of the sill beam 7;

[0075] One end of the second side plate 74 is connected to the end of the top plate 71 far from the first side plate 73, the other end of the second side plate 74 extends towards the bottom plate 75, and the extension length of the second side plate 74 is less than that of the first side plate 73;

[0076] The bottom plate 75 extends in the direction pointing to the front side of the sill beam 7, and the extension length is less than that of the top plate 71, so as to form a notch 76 between the end of the bottom plate 75 far from the first side plate 73 and the end of the second side plate 74 far from the top plate 71.

[0077] The sill beam 7 can be formed by integrally bending a steel plate, and the top plate 71, the bottom plate 75, the first side plate 73, and the second side plate 74 are integrally formed, having relatively high structural strength.

[0078] The threshold beam 7 subtracts a bend for supporting the wooden floor on the basis of a conventional part, and at the same time elongates in height (elongation reference dimension 4 mm), and reduces the distance from the ground as much as possible, which can reduce the deformation risk of the chassis assembly 20.

[0079] In one embodiment, as Figure 4 shown, the threshold beam 7 includes a top plate 71 facing the container door, and a slope 72 that gradually decreases towards the rear side of the threshold beam 7 is provided on the upper surface of the top plate 71 to form a gap with the container door;

[0080] The slope 72 occupies all or part of the top plate 71. In the figure, the slope 72 occupies approximately 1 / 2 of the length of the top plate 71.

[0081] By providing the slope 72 and appropriately reducing the top height of the threshold beam 7, it is convenient for loading and unloading goods, and can closely fit with the sealing strip at the bottom of the container door, with strong waterproof performance.

[0082] In one embodiment, as Figure 1 、 Figure 2 shown, a plurality of threshold beam reinforcing plates 10 are provided inside the threshold beam 7, and the plurality of threshold beam reinforcing plates 10 are arranged close to the middle of the threshold beam 7. Accordingly, a plurality of connecting reinforcing plates 8 need to be provided to connect the plurality of threshold beam reinforcing plates 10 respectively. Since the middle of the threshold beam 7 is the main area for bearing the impact of goods and forklifts, arranging the threshold beam reinforcing plates 10 close to the middle of the threshold beam 7 can more effectively resist the impact on the threshold part during frequent loading and unloading of goods.

[0083] In one embodiment, as Figure 2 shown, the cross-sectional shape of the first bottom cross beam 2 is L-shaped, the second end of the connecting reinforcing plate 8 extends into the L-shaped area inside the first bottom cross beam 2, the top end of the first bottom cross beam 2 can be fixedly connected to the steel floor 6 by welding, and both ends of the first bottom cross beam 2 can be fixedly connected to the first bottom side beam 1 and the second bottom side beam 11 by welding respectively.

[0084] In one embodiment, as Figure 2 、 Figure 5 shown, the chassis assembly 20 further includes:

[0085] A fork slot 5 for accommodating the forklift forks;

[0086] The fork slot 5 includes a top wall 51, a first side wall 52 and a second side wall 53, and L-shaped bending structures facing the outside of the fork slot 5 are provided at one ends of the first side wall 52 and the second side wall 53 away from the top wall 51.

[0087] The fork slots 5 are arranged in parallel with the sill beam 7. The entrances and exits of the fork slots 5 are located on the side of the underframe assembly 20. The two ends of the fork slots 5 can be respectively welded and fixedly connected to the first bottom side beam 1 and the second bottom side beam 11. The underframe assembly 20 includes two fork slots 5, and the distance between the two fork slots 5 is adapted to the fork spacing of the forklift.

[0088] In one embodiment, the fork slot 5 is integrally bent. The fork slot 5 can be formed by integrally bending a steel plate. By adopting an integral bending part, different from the conventional fork slot formed by welding two C-shaped beams and a flat plate, the integral bending part has higher structural strength.

[0089] In one embodiment, as Figure 2 shown, the underframe assembly 20 further includes:

[0090] A second bottom cross beam 4, along the front-back direction of the underframe assembly 20, the second bottom cross beam 4 is adjacent to the fork slot 5. The cross-sectional shape of the second bottom cross beam 4 is Z-shaped, and the second bottom cross beam 4 forms a bending structure away from the fork slot 5 at one end far from the top wall 51, so as to form an operation space between the second bottom cross beam 4 and the fork slot.

[0091] The Z-shaped design makes the lower bending structure of the second bottom cross beam 4 leave a distance from the fork slot 5, which is convenient for installation and painting of paint and asphalt. The second bottom cross beam 4 is arranged at the weld of the steel floor 6, and the second bottom cross beam 4 is arranged in parallel with the sill beam 7. The steel floor 6 and the second bottom cross beam 4 are fixedly connected together by welding. Arranging the second bottom cross beam 4 at the weld of the steel floor 6 can also strengthen the connection strength between the floor units and prevent the floor units from cracking at the weld.

[0092] In one embodiment, as Figure 1 shown, the underframe assembly 20 further includes:

[0093] A front sill beam 9, the front sill beam 9 is located at the front end of the underframe assembly 20, and the front end of the underframe assembly 20 is located below the closed end of the container;

[0094] A steel floor 6, both ends of the steel floor 6 are respectively arranged on the sill beam 7 and the front sill beam 9;

[0095] The steel floor 6 includes multiple floor units, and adjacent floor units are connected by welding.

[0096] The front sill beam 9 can be formed by integrally bending a steel plate, and the integral bending part has higher structural strength. The steel floor 6 is fixedly connected to the sill beam 7 and the front sill beam 9 by welding.

[0097] The floor unit is a steel plate with relatively small dimensions, such as a diamond plate. In the figure, the steel floor 6 includes five floor units, and the five floor units have the same length and different widths, and are combined to adapt to the length of the underframe assembly 20.

[0098] In this embodiment, the underframe assembly 20 uses a steel floor 6 instead of a wooden floor. Since the steel floor 6 is fixed by welding and does not require a large number of self-tapping screws to fix the floor and the bottom cross beam, the manufacturing cost can be reduced. By providing the steel floor 6, the requirements of customers for the container floor in terms of compressive strength, wear resistance, easy cleaning, and strong sealing can also be met.

[0099] In one embodiment, as Figure 1 , Figure 2 shown, the underframe assembly 20 further includes:

[0100] at least one second bottom cross beam 4 and at least one third bottom cross beam 3;

[0101] The first bottom cross beam 2, the second bottom cross beam 4, and the third bottom cross beam 3 are arranged at intervals in the front-rear direction of the underframe assembly 20 and are all connected to the lower side of the steel floor 6;

[0102] Among them, the cross-sectional shape of the second bottom cross beam 4 is Z-shaped, and the cross-sectional shape of the third bottom cross beam 3 is C-shaped;

[0103] The top of the second bottom cross beam 4 and / or the top of the third bottom cross beam 3 are / is located at the weld of adjacent floor units, and the second bottom cross beam 4 and / or the third bottom cross beam 3 are welded to the steel floor 6.

[0104] The second bottom cross beam 4 is arranged at the weld of the steel floor 6 and is arranged in parallel with the sill beam 7. The third bottom cross beam 3 is arranged at the weld of the steel floor 6 and is arranged in parallel with the sill beam 7. The underframe assembly 20 may include multiple third bottom cross beams 3. In the figure, three third bottom cross beams 3 are provided, and together with the second bottom cross beam 4, it exactly corresponds to the four welds of the steel floor 6.

[0105] The steel floor 6 is fixedly connected to the second bottom cross beam 4 and the third bottom cross beam 3 by welding. The second bottom cross beam 4 and the third bottom cross beam 3 being arranged at the welds of the steel floor 6 can also strengthen the connection strength between the floor units and prevent the floor units from cracking at the welds.

[0106] An embodiment of the present utility model further provides a container 100, including: the underframe assembly 20 according to any one of the above embodiments.

[0107] In one embodiment, the container 100 further includes a top plate assembly and side plate assemblies. The container 100 includes a total of two groups of side plate assemblies, namely: a first side plate assembly and a second side plate assembly. The first side plate assembly and the second side plate assembly have the same structure and are symmetrically arranged on both sides in the length direction of the container 100.

[0108] The underframe assembly 20 is disposed at the bottom of the container 100 and is fixedly connected to the first side plate assembly and the second side plate assembly on the left and right sides respectively.

[0109] In one embodiment, the container 100 further includes:

[0110] Four corner fittings, disposed at the corners of the container 100; four bottom corner fittings, disposed at the bottom corners of the container 100.

[0111] In one embodiment, the container 100 further includes:

[0112] A front end assembly, the front end assembly includes a whole metal plate with reinforcing ribs;

[0113] A rear end assembly, the rear end assembly includes a container door, and the container door can be a double-opening door structure for easy unloading.

[0114] According to an underframe assembly and a container of the present utility model, by strengthening the structure at the sill beam, the load-bearing strength of the sill beam is improved, and it can effectively resist the impact on the sill part during frequent loading and unloading of goods, significantly improving the structural strength of the underframe assembly, reducing the deformation degree of the bottom of the rear end of the container, extending the service time of the container, and ensuring the transportation safety of the container.

[0115] In all the above preferred embodiments, the processes and steps described are only examples. Unless adverse effects occur, various processing operations can be performed in an order different from the order of the above processes. The order of the steps of the above processes can also be increased, combined or deleted according to actual needs.

[0116] When understanding the scope of the present utility model, as used herein, the term "comprising" and its derivatives are intended to be open-ended terms that specify the presence of the recited features, elements, components, groups, wholes and / or steps, but do not exclude the presence of other unrecited features, elements, components, groups, wholes and / or steps. This concept also applies to words with similar meanings, such as the terms "including", "having" and their derivatives.

[0117] As used herein, the term "attached" or "attachment" includes: a configuration in which an element is directly fixed to another element by directly fixing the element to the other element; a configuration in which an element is indirectly fixed to another element by fixing the element to an intermediate member, and the intermediate member is in turn fixed to the other element; and a configuration in which one element is integral with another element, that is, one element is substantially a part of the other element. This definition also applies to words with similar meanings, such as "connected", "coupled", "mounted", "adhered", "fixed" and their derivatives. Finally, degree terms such as "substantially", "about" and "approximate" used herein represent the amount of deviation that modifies the term such that the final result will not change significantly.

[0118] Unless otherwise defined, the technical and scientific terms used herein have the same meanings as commonly understood by one of ordinary skill in the technical field of the present utility model. The terms used herein are only for the purpose of describing specific implementation objectives and are not intended to limit the present utility model. The features described in one embodiment herein can be applied to another embodiment alone or in combination with other features, unless the feature is not applicable or otherwise stated in that other embodiment.

[0119] The present utility model has been described by the above embodiments, but it should be understood that the above embodiments are only for the purpose of illustration and example, and are not intended to limit the present utility model within the scope of the described embodiments. In addition, those skilled in the art can understand that the present utility model is not limited to the above embodiments, and more variations and modifications can be made according to the teachings of the present utility model, and these variations and modifications all fall within the scope of protection required by the present utility model.

Claims

1. A chassis assembly for a container, characterized in that, The underframe assembly (20) includes: A sill beam (7), the sill beam (7) being located at the rear end of the underframe assembly (20); A sill beam reinforcement plate (10), the sill beam reinforcement plate (10) being disposed inside the sill beam (7) and fixedly connected to the sill beam (7) perpendicularly; At least one first bottom crossbeam (2), along the front-rear direction of the underframe assembly (20), at least one of the first bottom crossbeams (2) being adjacent to the sill beam (7); A connecting reinforcement plate (8), a first end of the connecting reinforcement plate (8) being fixedly connected to the sill beam reinforcement plate (10), and a second end of the connecting reinforcement plate (8) being fixedly connected to the first bottom crossbeam (2) close to the sill beam (7).

2. The underframe assembly according to claim 1, characterized in that The sill beam (7) is of a semi-enclosed structure to form a notch (76) on a side facing the first bottom crossbeam (2); The connecting reinforcement plate (8) is fixedly connected to the sill beam reinforcement plate (10) through the notch (76).

3. The underframe assembly according to claim 2, characterized in that, The sill beam (7) includes: a top plate (71), a bottom plate (75), a first side plate (73), and a second side plate (74); Wherein, the top plate (71) is located vertically above the bottom plate (75) and is spaced from the bottom plate (75) by a predetermined distance; Two ends of the first side plate (73) are respectively connected to one end of the top plate (71) and the bottom plate (75) at the rear side of the sill beam (7); One end of the second side plate (74) is connected to an end of the top plate (71) far from the first side plate (73), the other end of the second side plate (74) extends towards the bottom plate (75), and the extending length of the second side plate (74) is less than that of the first side plate (73); The bottom plate (75) extends in a direction pointing to the front side of the sill beam (7), and the extending length is less than that of the top plate (71), so as to form the notch (76) between one end of the bottom plate (75) far from the first side plate (73) and one end of the second side plate (74) far from the top plate (71).

4. The underframe assembly according to claim 1, characterized in that, The sill beam (7) includes a top plate (71) facing the container door, and an upper surface of the top plate (71) is provided with a slope (72) gradually decreasing towards the rear side of the sill beam (7) to form a gap with the container door; The slope (72) occupies all or part of the top plate (71).

5. The underframe assembly according to claim 1, characterized in that, A plurality of the sill beam reinforcement plates (10) are disposed inside the sill beam (7), and the plurality of the sill beam reinforcement plates (10) are disposed close to the middle of the sill beam (7).

6. The underframe assembly according to claim 1, wherein, The cross-sectional shape of the first bottom crossbeam (2) is L-shaped.

7. The underframe assembly according to claim 1, characterized in that, The underframe assembly (20) further includes: A fork slot (5), the fork slot (5) being used for accommodating the forklift forks; The fork slot (5) includes a top wall (51), a first side wall (52), and a second side wall (53), and L-shaped bending structures facing the outside of the fork slot (5) are provided at one ends of the first side wall (52) and the second side wall (53) far from the top wall (51).

8. The underframe assembly according to claim 7, characterized in that, The fork slot (5) is integrally bent and formed.

9. The underframe assembly according to claim 7, wherein, The underframe assembly (20) further includes: The second bottom crossbeam (4), along the front - rear direction of the chassis assembly (20), the second bottom crossbeam (4) is adjacent to the fork groove (5). The cross - sectional shape of the second bottom crossbeam (4) is Z - shaped, and the second bottom crossbeam (4) forms a bending structure deviating from the fork groove (5) at one end far from the top wall (51), so as to form an operation space between the second bottom crossbeam (4) and the fork groove.

10. The underframe assembly according to claim 1, characterized in that, The chassis assembly (20) further includes: A front sill beam (9), the front sill beam (9) is located at the front end of the chassis assembly (20); A steel floor (6), both ends of the steel floor (6) are respectively arranged on the sill beam (7) and the front sill beam (9); The steel floor (6) includes multiple floor units, and adjacent floor units are connected by welding.

11. The underframe assembly according to claim 10, characterized in that, The chassis assembly (20) further includes: At least one second bottom crossbeam (4) and at least one third bottom crossbeam (3); The first bottom crossbeam (2), the second bottom crossbeam (4) and the third bottom crossbeam (3) are arranged at intervals along the front - rear direction of the chassis assembly (20), and are all connected below the steel floor (6); Wherein, the cross - sectional shape of the second bottom crossbeam (4) is Z - shaped, and the cross - sectional shape of the third bottom crossbeam (3) is C - shaped; The top of the second bottom crossbeam (4) and / or the top of the third bottom crossbeam (3) is located at the weld of adjacent floor units, and the second bottom crossbeam (4) and / or the third bottom crossbeam (3) is / are welded to the steel floor (6).

12. A container, characterized in that, Comprising: The chassis assembly (20) according to any one of claims 1 - 11.

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