CN1231400C - Under carriage structure of container - Google Patents

Abstract

The invention relates to a container, in particular to a container underframe structure; the underframe structure includes a bottom side beam (1) and a plurality of bottom beams (3) connected to the bottom side beam (1), and is characterized in that it also includes a At least two longitudinal beams (2) longitudinally connected to the bottom beam (3) form a frame body, and the frame body is covered with a steel plate (5). The multiple longitudinal beams connected with it can increase the support rigidity of the bottom of the container and reduce the number of bottom beams. The bottom beams and longitudinal beams can be made of thinner steel plates, and the steel floor can be used instead of the wooden floor, thereby reducing the container load. The material cost and self-weight of the container body are reduced, so that the production and cost of the container are not restricted by the supply of wooden floors, and at the same time, the loading capacity of the container body is increased.

Description

Underframe structure of the container

technical field

The invention relates to a container, in particular to an underframe structure of the container.

Background technique

Containers were first used in the United States in 1956. After more than 40 years of development, containerized transportation has been widely used around the world. A traditional cargo container generally consists of a pair of side walls, a door end, a front end, a roof, a floor and an underframe structure. The underframe structure and the floor together form the load-bearing structure for the goods in the box. For decades, people have taken for granted an underframe structure consisting primarily of two longitudinal bottom side beams and multiple bottom cross beams as the standard floor structure. Although in recent years, container designers and users hope and try to improve the floor structure to reduce its cost, but all fail to achieve results.

The traditional underframe structure of the container is welded with the bottom side beam at both ends of each bottom beam to form a rigid whole, and a 28 mm thick wooden floor is laid on the bottom beam to form the cargo floor. In order to meet the ISO test of containers, the bottom beams are closely arranged and there are a large number of them, and the bottom beams need to be made of thicker steel (generally 4-4.5mm) to pass the ISO test, and the material consumption of the bottom beams is large. The floor of the traditional container is a wooden floor, which requires a special hard wooden floor. On the one hand, the quality of the wooden floor is quite different, the price is high, and the cost is high, and it is affected by factors such as the shortage of the wooden floor; on the other hand, the thickness of the wooden floor It is also larger (28mm), and the weight of the wooden floor is heavy, making the box body heavier.

Contents of the invention

A technical problem to be solved by the present invention is to provide a new type of container underframe structure, which can reduce the number of bottom beams of the original container, thereby reducing the weight of the box and saving materials. Another technical problem to be solved by the present invention is , by using sheet steel instead of wood to make floors, saving valuable wood and reducing costs.

The technical solution of the present invention to solve the above-mentioned problems is to design a container underframe structure, including bottom side beams and multiple bottom beams connected with the bottom side beams. The connected at least two longitudinal beams jointly form an integral frame body, and the frame body is covered with steel plates.

The underframe structure of the container provided by the present invention can improve the supporting rigidity and strength of the bottom of the container by arranging a plurality of longitudinal beams connected to the underframe beams, and can reduce the number of bottom beams, and the bottom beams and longitudinal beams can be Using thinner steel plates and replacing wooden floors with steel floors can pass the ISO test, thereby reducing the material cost and self-weight of the container, avoiding the constraints of the production and cost of the container from the supply of wooden floors, and improving the quality of the container Loading. Below in conjunction with accompanying drawing, further illustrate the present invention with preferred embodiment.

Description of drawings

Fig. 1 is a partial top view of the container underframe structure of the present invention;

Fig. 2 is A-A sectional view in Fig. 1;

Fig. 3 is a partially enlarged perspective view of a connection structure between the bottom beam and the longitudinal beam in Fig. 1;

Fig. 4 is a partial enlarged perspective view of another connection structure between the bottom beam and the longitudinal beam in Fig. 1;

Fig. 5 is the B-B sectional view of Fig. 1;

Fig. 6 is a partial top view of the underframe structure and wooden floor of a conventional general cargo container;

Fig. 7 is the C-C sectional view of Fig. 6;

Fig. 8 is a D-D sectional view of Fig. 6;

Fig. 9 is a sectional view of the bottom beam and the steel floor of the chassis structure of the present invention;

Fig. 10 is a cross-sectional view of a bottom beam and a wooden floor of a traditional underframe structure.

specific embodiment

As shown in Figure 1, the new container underframe structure is mainly composed of two bottom side beams 1, several longitudinal beams 2, and several bottom beams 3. Beams 3 are intersected and welded to form a complete rigid frame structure. Compared with the underframe structure (shown in Fig. 6) of the conventional general-purpose container for general cargo, the difference is that the underframe structure of the present invention adds several longitudinal beams 2, so that the bottom frame structure of the underframe structure can The spacing L1 of the beams can be much larger than the spacing L3 of the bottom beams of the traditional underframe structure, so that the number of the bottom beams is greatly reduced.

As shown in FIG. 1 and FIG. 2 , several longitudinal beams 2 are intersected and welded with several bottom beams 3 , and the longitudinal beams 2 are distributed along the length direction of the bottom beam 3 . In order to ensure that the longitudinal beams pass the ISO test with smaller cross-sectional dimensions H2, B2 and thinner wall thickness T2, the distance between longitudinal beams L2 should be less than or equal to 600mm, preferably less than or equal to 300mm, preferably equal to the container floor test wheel 4 (see Figure 2) has a width of 180 mm, so that at least one longitudinal beam directly supports the test wheel 4, and the distance L1 between adjacent bottom cross beams 3 should be selected appropriately and should not be too large.

There can be many structural forms for the connection between the longitudinal beam 2 and the bottom beam 3, and the following are two representative ones:

As shown in Figure 3, the bottom beam 3 is provided with a plurality of upwardly opening grooves 6 or holes distributed at certain intervals, which can be placed or passed through the grooves 6 or holes to intersect with the bottom beam 3 and welded;

As shown in FIG. 4 , multiple longitudinal beams 2 are arranged between two adjacent bottom cross beams 3 , and the longitudinal beams 2 are welded to two adjacent bottom cross beams 3 .

In the above structure, the bottom beam 3 and the longitudinal beam 2 can be made of L-shaped, I-shaped, T-shaped, U-shaped, C-shaped or square frame-shaped steel.

As shown in Fig. 2 and Fig. 5, the bottom side beam 1, the longitudinal beam 2, and the bottom beam 3 are welded with the floor 5 to form a rigid whole and a cargo-carrying ground. After the floor 5 is welded with the longitudinal beam 2 and the bottom beam 3, the bending resistance of the longitudinal beam and the bottom beam is increased, which is beneficial to reduce its section size and weight. The floor 5 adopts steel plates. According to the present invention, the steel floor 5 can adopt a steel plate with a thickness not greater than 4 mm.

As shown in Fig. 7 and Fig. 8, on the bottom beam 7 of the traditional underframe structure, a wooden floor 8 needs to be laid to form the cargo-carrying ground of the container. Fig. 9 is the connection of the bottom beam 3 of the novel underframe structure and the steel floor 5, and Fig. 10 is the connection of the bottom beam 7 of the traditional underframe structure and the wooden floor 8. Compared with the traditional structure, the advantages of the underframe structure of the present invention are as follows:

(a). The height H1 of the bottom beam 3 of the novel underframe structure is greater than the height H3 of the bottom beam 7 of the traditional underframe structure, so that the cross-sectional material distribution of the bottom beam 3 is more conducive to the bending resistance of the bottom beam;

(b). The bottom beam 3 and the steel floor 5 are welded as a whole, and the material in the vicinity of the welding of the steel floor 5 and the bottom beam 3 will greatly improve the bending resistance of the bottom beam 3;

Thereby under the condition of passing ISO test, the wall thickness T1 of bottom beam 3 (the present invention) is thinner, is generally about 2～3 millimeters, and the wall thickness T3 of bottom beam 7 (prior art) is thicker, is generally 4 mm. ~4.5 mm. The bottom width B1 of the bottom beam 3 is similar to the bottom width B3 of the bottom beam 7, and the height H1 of the bottom beam 3 is greater than the height H3 of the bottom beam 7, but overall, the weight of the bottom beam 3 is lighter than that of the bottom beam 7 .

The steel floor is an ordinary steel plate, compared with the wooden floor: light weight, low cost, and stable market supply. Under the condition of passing the ISO test, the new underframe structure reduces the number of bottom beams and the weight of the bottom beam, and uses thin steel plates instead of wood floors, so the new underframe structure reduces material costs compared with the traditional underframe structure; The steel floor replaces the traditional wooden floor, avoiding the impact of the shortage of wooden floor supply on container production and cost. The new underframe structure and steel floor realize the purpose of reducing the material cost of the container, reducing the self-weight of the container body and increasing the maximum loading capacity.

Claims (10)

1. An underframe structure of a container, comprising bottom side beams (1) and multiple bottom beams (3) connected to the bottom side beams (1), characterized in that it also includes At least two longitudinal beams (2) connected by the crossbeams (3) jointly form an integral frame body, and the frame body is covered with a bottom plate (5). 2. The container underframe structure according to claim 1, characterized in that there are at least three longitudinal beams (2). 3. The underframe structure of the container according to claim 1, wherein the distance between two adjacent longitudinal beams of the plurality of longitudinal beams is not greater than 600 mm. 4. The underframe structure of the container according to claim 3, wherein the interval between two adjacent longitudinal beams of the plurality of longitudinal beams is not greater than 300 mm. 5. The underframe structure of the container according to claim 4, wherein the distance between two adjacent longitudinal beams of the plurality of longitudinal beams is not greater than 180 mm. 6. The underframe structure of the container according to claim 1, characterized in that the bottom beam (3) in the underframe is cross-jointed with the longitudinal beam (2). 7. The underframe structure of the container according to claim 1, wherein the longitudinal beam is arranged between two adjacent bottom beams and connected with the bottom beams. 8. The container underframe structure according to any one of claims 1 to 7, characterized in that the cross-sectional shapes of the bottom beam and the longitudinal beam can be: L-shaped, I-shaped, T-shaped, U-shape, C-shape, or box-shape. 9. The container underframe structure according to any one of claims 1 to 7, characterized in that the bottom plate (5) is a steel plate. 10. The container underframe structure according to claim 9, characterized in that the thickness of the bottom plate (5) is not greater than 4 mm.

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