Roll-on mahfie plate structure and roll-on mahfie semitrailer

Abstract

A kind of roll loading mahfud board structure, including the rectangular frame structure being connected by two edge longitudinal beams, front end beam, rear end beam, several wooden boards, traction assembly is installed on the front end beam, two edge longitudinal beams are fixedly provided with suspension crossbeam, it further include first intermediate longitudinal beam, second intermediate longitudinal beam, and several crossbeams, the both ends of the first intermediate longitudinal beam are connected with front end beam and suspension crossbeam respectively, the both ends of the second intermediate longitudinal beam are connected with suspension crossbeam and rear end beam respectively, and the first intermediate longitudinal beam and the second intermediate longitudinal beam are flush with rectangular frame structure, several crossbeams are connected between intermediate longitudinal beam and edge longitudinal beam, and are distributed along the length direction of rectangular frame structure, several wooden boards are laid on crossbeam, and are combined to form roll loading mahfud board structure.The utility model is provided with intermediate longitudinal beam, which is matched with connected crossbeam, supports large mass goods, effectively reduces its deformation amount, and guarantees the service life and stability of mahfud.

Description

Technical Field

[0001] This utility model relates to the field of logistics, and in particular to a roll-on / roll-off (Ro-Ro) MVIF plate structure and a Ro-Ro MVIF semi-trailer. Background Technology

[0002] Maffei flats are a common type of roll-on / roll-off (Ro-Ro) cargo transport vehicle. When used in combination with a Maffei tractor, they are ideal for transporting oversized, overweight, and other cargoes that are not suitable for container transport.

[0003] A typical Maffei board consists of a rectangular frame and multiple crossbeams connected within this frame. Wooden strips are laid on the crossbeams, flush with the rectangular frame. When transporting heavy goods, if the goods cannot be supported on the rectangular frame, the heavy load will exert enormous pressure on the crossbeams, causing them to bend irreversibly downwards. This severely shortens the lifespan of the Maffei board and jeopardizes the safety of the transported goods.

[0004] Therefore, how to design a roll-on Maffei board with a simple structure, stable support, and long service life is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a roll-on / roll-off mulley board structure. By setting a central longitudinal beam, which works in conjunction with the connected crossbeams, it provides support for heavy cargo, effectively reducing its own deformation and ensuring the service life and stability of the mulley board.

[0006] The technical solution of this utility model is: a roll-on / roll-off mulberry board structure, including a rectangular frame structure formed by two side longitudinal beams, a front beam, and a rear beam, several wooden strips, a traction assembly installed on the front beam, a suspension crossbeam fixed between the two side longitudinal beams, a first intermediate longitudinal beam, a second intermediate longitudinal beam, and several crossbeams. The two ends of the first intermediate longitudinal beam are respectively connected to the front beam and the suspension crossbeam, and the two ends of the second intermediate longitudinal beam are respectively connected to the suspension crossbeam and the rear beam. The first intermediate longitudinal beam and the second intermediate longitudinal beam are flush with the rectangular frame structure. Several crossbeams are connected between the intermediate longitudinal beams and the side longitudinal beams and are distributed at intervals along the length of the rectangular frame structure. Several wooden strips are laid on the crossbeams to form the roll-on / roll-off mulberry board structure.

[0007] It also includes two forklift slots, which pass through the two side longitudinal beams and the first intermediate longitudinal beam, and are fixed.

[0008] The two ends of the first intermediate longitudinal beam are respectively connected to the middle of the front beam and the suspension crossbeam, and the two ends of the second intermediate longitudinal beam are respectively connected to the middle of the suspension crossbeam and the rear beam.

[0009] Both the first and second intermediate longitudinal beams are I-beams, and are respectively welded and fixed between the front beam and the suspension beam, and between the suspension beam and the rear beam.

[0010] Each crossbeam is an I-beam, which is fixed between the middle longitudinal beam and the side longitudinal beam by welding.

[0011] Both the first and second intermediate longitudinal beams are square tubes and are detachably fixed between the front beam and the suspension beam, and between the suspension beam and the rear beam, respectively, by bolts.

[0012] Both ends of the first intermediate longitudinal beam and the second intermediate longitudinal beam are welded with flanges. The first intermediate longitudinal beam and the second intermediate longitudinal beam are respectively connected by bolts through the corresponding flanges, end beams, and suspension beams and nuts to form a detachable connection.

[0013] Each crossbeam has a flange welded to both ends. Each crossbeam is connected by bolts through the corresponding flange, side longitudinal beam, and middle longitudinal beam, and nuts to form a detachable connection.

[0014] This utility model also provides a roll-on / roll-off mulé semi-trailer, including any of the above-mentioned roll-on / roll-off mulé plate structures, and a set of support wheels mounted on the suspension beam of the roll-on / roll-off mulé plate structure.

[0015] At least one mounting seat is provided at each end of the bottom surface of the suspension beam. The support wheel assembly includes a support beam, and rubber wheels are rotatably mounted at both ends of the support beam. The middle part of the support beam of the support wheel assembly is hinged to the corresponding mounting seat to support the suspension beam.

[0016] The above technical solution has the following beneficial effects: 1. The roll-on / roll-off mulley board structure includes a rectangular frame structure formed by two side longitudinal beams, a front beam, and a rear beam, and several wooden strips. A traction assembly is installed on the front beam, and a suspension crossbeam is fixed between the two side longitudinal beams. The rectangular frame structure serves as the base frame, and the traction assembly and suspension crossbeam are standard features for roll-on / roll-off mulley boards. It also includes a first intermediate longitudinal beam, a second intermediate longitudinal beam, and several crossbeams. The two ends of the first intermediate longitudinal beam are connected to the front beam and the suspension crossbeam, respectively. The two ends of the second intermediate longitudinal beam are connected to the suspension crossbeam and the rear beam, respectively. Both the first and second intermediate longitudinal beams are flush with the rectangular frame structure. The front beam, rear beam, and suspension crossbeam are all strong structural members. By connecting the two intermediate longitudinal beams to these strong structural members, the structural strength and stability of the connected first and second intermediate longitudinal beams are ensured. Several crossbeams connect the central and side longitudinal beams, distributed at intervals along the length of the rectangular frame structure. This means that the length of these crossbeams is half that of traditional crossbeams, effectively improving their bending resistance without increasing their specifications. Several wooden strips are laid on the crossbeams, forming a roll-on / roll-off Maffei board structure. When subjected to heavy loads in a localized (central) area, this structure effectively reduces deformation of the supporting components due to their high bending resistance, ensuring the stability of the wooden strips and thus guaranteeing the service life and stability of the roll-on / roll-off Maffei board.

[0017] 2. It also includes two forklift slots, which pass through the two side longitudinal beams and the first intermediate longitudinal beam and are fixed. The forklift slots are used by forklifts to transfer the stacked Maffei boards. At the same time, since the forklift slots connect the side longitudinal beams and the intermediate longitudinal beam, they can also improve the structural strength of the forklift slots, side longitudinal beams and intermediate longitudinal beams, further improving the stability of the rectangular frame structure.

[0018] 3. Both the first and second intermediate longitudinal beams are square tubes, and are detachably fixed to the front beam and the suspension crossbeam, and the suspension crossbeam and the rear beam, respectively, by bolts. That is, the two intermediate longitudinal beams are detachable structures. Flanges are welded to both ends of the first and second intermediate longitudinal beams. The first and second intermediate longitudinal beams are connected by bolts passing through the corresponding flanges, end beams, and suspension crossbeams, and then nutted to form a detachable connection. This connection structure is very convenient for installation and disassembly, while ensuring the connection strength of the intermediate longitudinal beams. Flanges are welded to both ends of each crossbeam. Each crossbeam is connected by bolts passing through the corresponding flanges, side longitudinal beams, and intermediate longitudinal beams, and then nutted to form a detachable connection. This connection structure is very convenient for installation and disassembly, while ensuring the connection strength of each crossbeam. The intermediate longitudinal beams and crossbeams are designed as detachable structures, allowing for the selection and installation of appropriate intermediate longitudinal beams and crossbeams according to actual needs. While ensuring support strength, this reduces the self-weight of the Maffei board, meeting the requirements of logistics transportation.

[0019] 4. The roll-on / roll-off mulley semi-trailer provided by this utility model includes any of the above-mentioned roll-on / roll-off mulley plate structures, and a support wheel assembly installed on the suspension beam of the roll-on / roll-off mulley plate structure. The support wheel assembly includes a support beam, and rubber wheel pairs are rotatably mounted at both ends of the support beam. The middle of the support beam of the support wheel assembly is hinged to the corresponding mounting seat to support the suspension beam. This type of support wheel assembly contains four rubber wheels and is installed at the end of the suspension beam by hinge, so that the support wheel assembly can rotate along the length direction. It can ensure effective support of the four rubber wheels at different slopes, thus ensuring the transportation stability and safety of the semi-trailer.

[0020] The following description, in conjunction with the accompanying drawings and specific embodiments, provides further details. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 Side view; Figure 3 for Figure 1 Top view; Figure 4 for Figure 1 AA section view; Figure 5 This is a schematic diagram showing the connection between the first intermediate longitudinal beam and the suspension crossbeam of this utility model via a flange. Figure 6 This is a schematic diagram of the installation of the support wheel assembly for the roll-on / roll-off Maffei semi-trailer of this utility model; Figure 7 This is a schematic diagram of the support wheel assembly of the roll-on / roll-off Maffei semi-trailer of this utility model.

[0022] In the attached diagram, 1 is the side longitudinal beam, 2 is the front beam, 3 is the rear beam, 4 is the wooden strip, 5 is the traction assembly, 6 is the suspension crossbeam, 7 is the first intermediate longitudinal beam, 8 is the second intermediate longitudinal beam, 9 is the crossbeam, 10 is the forklift slot, 11 is the flange, 12 is the support wheel set, 13 is the mounting base, 14 is the support beam, and 15 is the rubber wheel set. Detailed Implementation Example 1

[0023] See Figures 1 to 5This is a specific embodiment of a roll-on / roll-off mulley board structure. The roll-on / roll-off mulley board structure includes a rectangular frame structure formed by two side longitudinal beams 1, a front beam 2, and a rear beam 3, and several wooden strips 4. A traction assembly 5 is installed on the front beam 2, and a suspension crossbeam 6 is fixedly installed between the two side longitudinal beams. In this embodiment, the rectangular frame structure has a length of 12630mm and a width of 2550mm. The front and rear beams are made of rectangular tubing, the side longitudinal beams are made of I-beams, and the traction assembly and suspension crossbeams are conventional structures, assembled using conventional installation methods. It also includes a first intermediate longitudinal beam 7, a second intermediate longitudinal beam 8, and several crossbeams 9. The first intermediate longitudinal beam 7 is connected at both ends to the front beam 2 and the suspension crossbeam 6, respectively. The second intermediate longitudinal beam 8 is connected at both ends to the suspension crossbeam 6 and the rear beam 3, respectively. Both the first intermediate longitudinal beam 7 and the second intermediate longitudinal beam 8 are flush with the rectangular frame structure. To ensure the stability of the support, the first intermediate longitudinal beam 7 is connected at both ends to the middle of the front beam 2 and the suspension crossbeam 6, respectively. The second intermediate longitudinal beam 8 is connected at both ends to the middle of the suspension crossbeam 6 and the rear beam 3, respectively. Obviously, since the suspension crossbeam is close to the rear beam, the length of the first intermediate longitudinal beam is longer than the length of the second intermediate longitudinal beam. The first and second intermediate longitudinal beams are located on the same straight line. Typically, when the first intermediate longitudinal beam 7 and the second intermediate longitudinal beam 8 are selected as I-beams, the first... The intermediate longitudinal beam and the second intermediate longitudinal beam are fixed to the front beam and the suspension crossbeam, and the suspension crossbeam and the rear beam, respectively, by welding to form a fixed structure. Alternatively, the first intermediate longitudinal beam 7 and the second intermediate longitudinal beam 8 can be square tubes, and flanges 11 are welded to both ends of the first intermediate longitudinal beam 7 and the second intermediate longitudinal beam 8. The first intermediate longitudinal beam and the second intermediate longitudinal beam are respectively bolted through the corresponding flanges, end beams, and suspension crossbeams and fitted with nuts to form a detachable connection. Obviously, the two flanges connected to the suspension crossbeam only need to be bolted through and locked with nuts. This structure allows the first intermediate longitudinal beam or the second intermediate longitudinal beam to be disassembled as needed (usually the second intermediate longitudinal beam is disassembled and the first intermediate longitudinal beam is retained). Several crossbeams 9 are connected between the intermediate longitudinal beams and the side longitudinal beams, and are distributed at intervals along the length of the rectangular frame structure. When the first and second intermediate longitudinal beams are fixed by welding, each crossbeam 9 uses I-beams and is fixed between the intermediate and side longitudinal beams by welding. When the first and second intermediate longitudinal beams are fixed by bolts, flanges 11 are welded to both ends of each crossbeam 9. Each crossbeam is bolted through the corresponding flange, side longitudinal beam, and intermediate longitudinal beam, and nut is engaged to form a detachable connection. As needed, some crossbeams can be disassembled while others are retained to meet logistics and transportation requirements. Several wooden strips 4 are laid on the crossbeams and combined to form a roll-on / roll-off Maffei board structure.

[0024] To meet the needs of stacking and storage, it also includes two forklift slots 10, which pass through the two side longitudinal beams and the first intermediate longitudinal beam 7 and are fixed. Typically, the two forklift slots are located in the middle of the rectangular frame structure.

[0025] This utility model, by setting a first intermediate longitudinal beam and a second intermediate longitudinal beam connected to a strong structural member and shortening the length of each crossbeam, makes the resulting support structure highly resistant to bending deformation. When subjected to the pressure of a large mass of cargo in a localized (central) area, it can effectively reduce the deformation of the support member, ensure the stability of the wooden strips, and thus guarantee the service life and stability of the roll-on / roll-off Maffei board. It can also meet the needs of transporting more types of goods.

[0026] According to the applicant's tests, when a traditional roll-on / roll-off Maffei plate is uniformly loaded with a 120T load, the maximum stress calculated based on the ultimate bearing capacity of the edge longitudinal beam is 135.1 MPa, with a safety factor of 2.55, which is greater than the safety factor design standard of 2.25. However, when the structure in this patent application is uniformly loaded with a 120T load, the maximum stress is 112.72 MPa, with a safety factor of 3.06, which is greater than the safety factor design standard of 2.25. Example 2

[0027] See Figure 6 and Figure 7 The roll-on / roll-off (Ro-Ro) MVNO semi-trailer, based on the Ro-Ro MVNO plate structure of Example 1, further incorporates a support wheel assembly 12 mounted on the suspension beam 6. Specifically, a mounting seat 13 is provided at each end of the bottom surface of the suspension beam 6. The support wheel assembly 12 includes a support beam 14, with rubber wheel pairs 15 rotatably mounted at both ends of the support beam 14. Both rubber wheels of the rubber wheel pairs are solid rubber wheels and are mounted at both ends of the same axle. The rubber wheel pairs are mounted to both ends of the support beam via the axle. The middle of the support beam of the support wheel assembly is hinged to the corresponding mounting seat, providing support for the suspension beam.

Claims

1. A roll-on / roll-off muslin structure, comprising a rectangular frame structure formed by two side longitudinal beams (1), a front beam (2), and a rear beam (3), several wooden strips (4), a traction assembly (5) mounted on the front beam (2), and a suspension crossbeam (6) fixedly arranged between the two side longitudinal beams, characterized in that: It also includes the first intermediate longitudinal beam (7), the second intermediate longitudinal beam (8), and several crossbeams (9). The two ends of the first intermediate longitudinal beam (7) are connected to the front beam (2) and the suspension beam (6) respectively. The two ends of the second intermediate longitudinal beam (8) are connected to the suspension beam (6) and the rear beam (3) respectively. The first intermediate longitudinal beam (7) and the second intermediate longitudinal beam (8) are flush with the rectangular frame structure. Several beams (9) are connected between the intermediate longitudinal beam and the side longitudinal beam, and are distributed at intervals along the length of the rectangular frame structure. Several wooden strips (4) are laid on the beams and combined to form a roll-on Maffei board structure.

2. The roll-on / roll-off mulley plate structure according to claim 1, characterized in that: It also includes two forklift slots (10), which pass through the two side longitudinal beams and the first intermediate longitudinal beam (7) and are fixed.

3. The roll-on / roll-off mulley plate structure according to claim 1, characterized in that: The two ends of the first intermediate longitudinal beam (7) are connected to the middle of the front beam (2) and the suspension crossbeam (6), respectively, and the two ends of the second intermediate longitudinal beam (8) are connected to the middle of the suspension crossbeam (6) and the rear beam (3), respectively.

4. The roll-on mulley mulley structure according to claim 1 or 3, characterized in that: The first intermediate longitudinal beam (7) and the second intermediate longitudinal beam (8) are both I-beams, and are respectively fixed by welding between the front beam and the suspension beam, and between the suspension beam and the rear beam.

5. The roll-on / roll-off mulley plate structure according to claim 1, characterized in that: Each crossbeam (9) is an I-beam, which is fixed between the middle longitudinal beam and the side longitudinal beam by welding.

6. The roll-on / roll-off mulley plate structure according to claim 1, characterized in that: The first intermediate longitudinal beam (7) and the second intermediate longitudinal beam (8) are both square tubes, and are respectively fixed between the front beam and the suspension beam, and between the suspension beam and the rear beam by bolts.

7. The roll-on / roll-off mulley plate structure according to claim 6, characterized in that: Both ends of the first intermediate longitudinal beam (7) and the second intermediate longitudinal beam (8) are welded with flanges (11). The first intermediate longitudinal beam and the second intermediate longitudinal beam are respectively connected by bolts through the corresponding flanges, end beams, suspension beams and nuts to form a detachable connection.

8. The roll-on / roll-off mulley plate structure according to claim 1, characterized in that: Each crossbeam (9) has a flange (11) welded to both ends. Each crossbeam is connected by bolts through the corresponding flange, side longitudinal beam, middle longitudinal beam and nuts to form a detachable connection.

9. A roll-on / roll-off semi-trailer, characterized in that: Includes any of the roll-on mulberry sheet structures of claims 1-8, and a set of support wheels (12) mounted on the suspension beam (6) of the roll-on mulberry sheet structure.

10. The roll-on / roll-off Maffei semi-trailer according to claim 9, characterized in that: At least one mounting seat (13) is provided at each end of the bottom surface of the suspension beam (6). The support wheel assembly (12) includes a support beam (14). Rubber wheelsets (15) are rotatably mounted at both ends of the support beam (14). The middle part of the support beam of the support wheel assembly is hinged to the corresponding mounting seat to support the suspension beam.

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