CN104743287B - Container and its steel floor chassis - Google Patents

Abstract

A container and its steel floor chassis, the steel floor chassis comprising a steel floor, bottom side beams located on both lateral sides of the steel floor, and a plurality of bottom beams arranged longitudinally at intervals below the steel floor and fixedly connected to the steel floor, The two ends of the bottom beam are respectively fixedly connected with the two bottom side beams; the bottom side beam is bent from the side of the steel floor and integrally formed with the steel floor. The invention improves the manufacturing efficiency, reduces the cost and improves the overall strength of the bottom frame.

Description

Container and its steel floor chassis

technical field

The invention relates to the field of containers, in particular to a container steel floor underframe and a container using the steel floor underframe.

Background technique

Common dry container chassis structures are mainly divided into two types. One is that the bottom side beams and bottom beams are welded into a steel structure, and then the wooden floor is screwed to the bottom beams. This structure is currently the most widely used container bottom. Frame structure, but this structure has the following disadvantages: (1) It needs to use a large number of floor nails to connect with the bottom beam. After drilling, arranging nails, locking nails and cleaning, the process is complicated and the labor cost is high. (2) The wooden floor and the bottom beam are connected at points. The floor and the bottom beam cannot be an integral force-bearing member. The moment of inertia and bending section coefficient of the bottom beam are relatively low. The deformation of the bottom beam is large during use, and the floor is easily damaged. , There are problems such as jumping nails, slipping wires, delamination, cracking or even breaking.

The other is to replace the wooden floor with a conventional steel floor, and its underframe is similar to that of the wooden floor underframe. Referring to Figure 1, the steel floor 1a of the flat structure is connected with the bottom side beams 2a on both sides and the front lower beams at both ends respectively. Welding with the sill and the lower bottom beam 3a requires many areas to be welded, and the manufacturing efficiency is low. The steel floor is also prone to welding deformation. In order to ensure the strength of the floor and reduce welding deformation, the thickness of the steel floor is relatively thick, generally 4mm~6mm , resulting in the high cost of the steel floor chassis, and it is heavy.

Contents of the invention

The invention provides a container steel floor underframe and a container using the steel floor underframe to solve the problems of low manufacturing efficiency and high cost of the existing steel floor underframe.

In order to solve the above-mentioned technical problems, the present invention proposes a container steel floor chassis, which includes a steel floor, bottom side beams located on both lateral sides of the steel floor, and multiple bottom beams arranged longitudinally at intervals below the steel floor and fixedly connected to the steel floor , the two ends of the bottom beam are respectively fixedly connected with the two bottom side beams; the bottom side beam is bent from the side of the steel floor and formed integrally with the steel floor.

Wherein, the steel floor is provided with strip-shaped reinforcing ribs protruding upwards in the longitudinal direction, and a plurality of reinforcing ribs are distributed in the transverse direction of the steel floor.

Wherein, the bottom side beam includes an inner web bent upward from the side of the steel floor, an upper wing bent vertically outward from the top of the inner web, and an outer wing bent vertically downward from the outer side of the upper wing. web; the end of the bottom beam is connected to the inner side of the outer web.

Wherein, the bottom side beam further includes a lower wing, and the lower wing is bent vertically inward from the lower end of the outer web.

Wherein, the height of the inner web is greater than the height of the reinforcing rib.

Wherein, the bottom side beam is L-shaped, including a web bent vertically downward from the side of the steel floor and a wing plate bent vertically inward from the lower end of the web; Web inner connection.

Wherein, the height of the reinforcing ribs is 5 mm to 25 mm, and the distance between two adjacent reinforcing ribs is greater than the width of the reinforcing ribs.

Wherein, the thickness of the steel floor and the bottom side beam is less than 4mm.

The present invention also provides a container comprising the above-mentioned steel floor chassis.

Compared with the prior art, the present invention has the following beneficial effects: in the container steel floor underframe of the present invention, the steel floor and the bottom side beam are integrally formed, which reduces the welding seam between the two in the existing separated structure and avoids It solves the problem of efficiency reduction caused by welding seam sanding, improves the efficiency of container manufacturing, and reduces labor costs; the two ends and the upper end of the bottom beam are respectively connected and fixed with the bottom side beam and the steel floor, and the integrated structure of the steel floor and the bottom side beam is the bottom The beam provides positioning and improves assembly efficiency; the steel floor is integrated with the bottom side beam, which has better strength and rigidity, reduces welding deformation caused by welding with the bottom beam, and improves the overall strength of the chassis. Reduce the thickness of the steel floor to reduce the cost and reduce the weight provides the conditions.

Description of drawings

Fig. 1 is a structural schematic diagram of a steel floor chassis in the prior art.

Fig. 2 is a structural schematic diagram of the first embodiment of the container steel floor underframe of the present invention.

Fig. 3 is a partially enlarged schematic diagram of A in Fig. 2 of the present invention.

Fig. 4 is a schematic structural view of the second embodiment of the container steel floor underframe of the present invention.

Fig. 5 is a partially enlarged schematic diagram of part B in Fig. 4 of the present invention.

Wherein, the reference signs are explained as follows: 1, steel floor; 11, stiffener; 2, bottom side beam; 21, inner web; 22, upper wing; 23, outer web; 24, lower wing; 26, Web plate; 27, wing plate; 3, bottom beam.

detailed description

In order to further illustrate the principle and structure of the present invention, preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

first embodiment

Please refer to Fig. 2 and Fig. 3, this embodiment provides a kind of container steel floor underframe, comprises steel floor 1, bottom side beam 2 and bottom beam 3, and bottom side beam 2 is positioned at the both sides of steel floor 1 transversely, and bottom side beam 2. Bending from the side of the steel floor 1 and integrally formed with the steel floor 1 (only one side of the steel floor is shown in the figure), the bottom crossbeam 3 is located under the steel floor 1, and there are multiple longitudinally spaced beams The upper end of the bottom beam 3 is welded and fixed to the lower surface of the steel floor 1, and the two ends of the bottom beam 3 are welded and fixed to the two bottom side beams 2 respectively. The steel floor 1 is provided with strip-shaped reinforcing ribs 11 protruding upwards in the longitudinal direction, and multiple reinforcing ribs 11 are distributed in the transverse direction of the steel floor 1 . Preferably, the height of the reinforcing ribs 11 is 5 mm to 25 mm, and the distance between two adjacent reinforcing ribs 11 is greater than the width of the reinforcing ribs 11, so that the welding length of the steel floor 1 and the bottom beam 3 accounts for more than 50% of the total width of the steel floor, ensuring The steel floor and the bottom beam constitute an integral force-bearing part to improve the load-bearing capacity.

The thickness of the steel floor 1 and the bottom side beam 2 can be set to be less than 4mm, which is thinner than the existing technology, saves the cost of steel materials, and reduces the weight of the steel floor chassis, but the strength and rigidity can be higher than the existing steel floor better. The thickness of the bottom beam 3 can be set to be unequal to the thickness of the steel floor according to the strength requirements, and the structural form of the bottom beam 2 can also be flexibly set. The bottom beam 3 shown in the figure is L-shaped, but it can also be T-shaped, straight type and other structures.

In the steel floor frame of the container, the steel floor and the bottom side beam are integrally formed, which reduces the welding seam between the two in the existing separated structure, avoids the problem of efficiency reduction caused by welding seam sanding, and improves the efficiency of the container. Manufacturing efficiency reduces labor costs; the two ends and the upper surface of the bottom beam are respectively welded and fixed to the bottom side beam and the steel floor, and the integrated structure of the steel floor and the bottom side beam provides welding positioning for the bottom beam and improves assembly efficiency; the steel floor and the steel floor The bottom and side beams are integrated, and reinforcing ribs are set on the steel floor, which has better strength and rigidity, reduces the welding deformation caused by welding with the bottom beam, improves the overall strength of the bottom frame, and reduces the thickness of the steel floor. The cost and the reduction of self-weight provide the conditions.

In this embodiment, the bottom side beam 2 is formed by bending from the side of the steel floor 1. The bottom side beam 2 includes an inner web 21 bent upward from the side of the steel floor 1, and a vertically outward bend from the upper end of the inner web 21. The upper wing plate 22, the outer web 23 bent vertically downward from the outer side of the upper wing plate 22 and the lower wing plate 24 bent vertically inward from the lower end of the outer web 23, the height of the outer web 23 is greater than that of the bottom beam 3 The height of the bottom cross beam 3 is clad inside the bottom side beam 2 and welded to the inner side of the outer web 23 . The bottom side beam 2 is bent upward for a certain distance from the side of the steel floor 1, which increases the overall height of the bottom side beam 2. On the one hand, the overall strength of the bottom side beam is improved, and the load-bearing capacity is improved, which can make up for the thickness reduction. The resulting strength loss is beneficial to further reduce the thickness of the bottom side beam to save material costs; on the other hand, the side of the steel floor is no longer a free edge, which reduces the deformation when welding with the bottom beam. When the container is assembled, the upper wing plate 22 is used for welding and fixing with the side plate of the container, and the welding can be performed from the outside to avoid welding seams in the box. Further, the height of the inner web 21 is greater than that of the reinforcing rib 11, so as to prevent the cargo in the container from directly impacting the side plate of the container. In some deformation structures, the bottom side beam 2 may not need to be provided with the lower wing plate 24 .

second embodiment

Please refer to Fig. 4 and Fig. 5. In this embodiment, the difference from the first embodiment is that the bottom side beam 2 is L-shaped, and the bottom side beam 2 includes a web bent vertically downward from the side of the steel floor 1. 26 and the wing plate 27 bent vertically inward from the lower end of the web 26 , the end of the bottom beam 3 is welded and fixed to the inner side of the web 26 . In this embodiment, the structure of the bottom and side beams is relatively simple, and other structures of the steel floor chassis in this embodiment are the same as those in the first embodiment, and will not be repeated here.

When the steel floor chassis of this embodiment is assembled into a container, the side edges of the steel floor 1 are used to weld and fix with the side panels of the container. Similarly, the welding can also be performed from the outside of the box to avoid welding seams inside the box.

In the above two embodiments, the connection between the bottom beam 3 and the steel floor 1 and the bottom side beam 2 is welded, and the fixing is reliable; in other embodiments, riveting, screws, etc. can also be used to fix the connection.

The above are only preferred feasible embodiments of the present invention, and do not limit the protection scope of the present invention. All equivalent structural changes made by using the description and drawings of the present invention are included in the protection scope of the present invention.

Claims (9)

1. a kind of steel floor of container chassis, including steel floor, the bottom side beams positioned at steel floor both lateral sides and positioned at steel floor Lower section is longitudinally spaced to arrange and more foundation crossbeams for being fixedly connected with steel floor, the both ends of the cross member respectively with two bottom side beams It is fixedly connected, it is characterised in that：

The bottom side beams are integrally formed, with the lower surface of the steel floor from steel floor side bending with the steel floor The locating surface of the bottom side beams is docked for the cross member, the both ends of the cross member and two bottom side beams are connected.

2. steel floor of container chassis according to claim 1, it is characterised in that：It is in bar that the steel floor, which is provided with longitudinal direction, Shape and upward reinforcement, the reinforcement are distributed with a plurality of in the steel floor transverse direction.

3. steel floor of container chassis according to claim 2, it is characterised in that：The bottom side beams are included from the steel The endosternum of the upward bending in plate side, from the vertical upper flange of outside bending and downward from upper flange outside vertical in endosternum upper end The outer web of bending；The cross member end on the inside of the outer web with being connected.

4. steel floor of container chassis according to claim 3, it is characterised in that the bottom side beams also include lower wing plate, The lower wing plate is from the outer perpendicularly inward bending in web lower end.

5. steel floor of container chassis according to claim 4, it is characterised in that：The endosternum is highly more than described add The height of strengthening tendons.

6. steel floor of container chassis according to claim 2, it is characterised in that：The bottom side beams are L-shaped, including from institute State the web of steel floor side bending vertically downward and the wing plate from the perpendicularly inward bending in web lower end；The cross member end with Connected on the inside of the web.

7. according to the steel floor of container chassis described in claim any one of 2-6, it is characterised in that：The reinforcement height is 5mm~25mm, the spacing of adjacent two reinforcement are more than the width of reinforcement.

8. steel floor of container chassis according to claim 7, it is characterised in that：The steel floor and the bottom side beams Thickness is less than 4mm.

9. a kind of container, it is characterised in that including the steel floor chassis described in claim any one of 1-8.