Spliced girder with thick neck and thin body

Abstract

The utility model discloses a thick-neck and thin-body spliced girder, which comprises a girder vertical plate, an upper wing plate and a lower wing plate, the girder vertical plate comprises a girder vertical plate front part and a girder vertical plate rear part, the rear end of the girder vertical plate front part and the front end of the girder vertical plate rear part are connected and fixed in sequence, the upper wing plate and the lower wing plate are of a one-plate forming structure, and the upper wing plate and the lower wing plate are connected in sequence. The upper end face and the lower end face of the girder vertical plate are respectively welded and fixed, and the whole is I-shaped; when the girder vertical plate and the girder vertical plate are fixed, the inner sides of the girder vertical plate and the girder vertical plate are flush, and the outer sides of the girder vertical plate and the girder vertical plate are spliced in a step shape. The frame is simple in structure and reasonable in design, through the two-section splicing type structure, the strength and the bearing capacity of the gooseneck portion of the girder can be improved, the cargo carrying weight of the semitrailer can be improved, paint spraying nonuniformity in the electrophoresis powder spraying process of the frame can be effectively avoided, the influence of electrophoresis residue remaining is avoided, and the production efficiency and the product quality are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle frame girders, and particularly relates to a spliced girder with a thick neck and a thin body. Background Technique

[0002] At present, semi-trailers have occupied a major position in China's transportation industry. The semi-trailer girder is the main load-bearing component on the semi-trailer, which is related to the bearing capacity and safety of the semi-trailer. Its function is to support the entire semi-trailer frame and provide an assembly space for accessories. The existing semi-trailer girder is a welded straight I-beam, and the middle vertical plate is a formed structure of a single whole plate. From its gooseneck part to the tail end, the plate is 5 mm thick. However, in order to increase the strength of the gooseneck part, a support web is welded by forging welding on the semi-trailer girder gooseneck part. However, the existence of the support web will cause the electrocoating liquid to not flow out completely after entering the interlayer during the electrocoating and powder spraying work of the vehicle frame, resulting in waste of raw materials and easy to leave residues. When painting, it will flow everywhere, directly affecting the painting quality. Content of the Utility Model

[0003] The purpose of the utility model is to solve the deficiencies existing in the above-mentioned existing background technique, and provide a spliced girder with a thick neck and a thin body.

[0004] To solve the above technical problems, the technical solution adopted by the utility model is: a spliced girder with a thick neck and a thin body, including a girder vertical plate, an upper wing plate and a lower wing plate. The girder vertical plate includes a front girder vertical plate and a rear girder vertical plate. The rear end of the front girder vertical plate is sequentially connected and fixed to the front end of the rear girder vertical plate. The upper wing plate and the lower wing plate are both formed by one plate, and are respectively welded and fixed to the upper end face and the lower end face of the girder vertical plate, presenting an I-shaped as a whole. The thickness of the front girder vertical plate is greater than that of the rear girder vertical plate. When they are fixed, the inner sides are flush and the outer sides are spliced in a stepped shape.

[0005] Further, the front girder vertical plate is directly integrally formed by a plate with a thickness of 10 mm, and the thickness of the rear girder vertical plate is 5 mm.

[0006] Further, the rear end of the front girder vertical plate is welded and fixed to the front end of the rear girder vertical plate. The welding joint between them is located at the horizontal beam of the overall vehicle frame, and its upper and lower widths are equal.

[0007] Further, a vertical strengthening vertical plate is welded and fixed to the outside of the welding seam between the front girder vertical plate and the rear girder vertical plate, perpendicular to the upper wing plate and the lower wing plate, increasing the connection strength and improving the aesthetics at the same time.

[0008] Further, the welding seam between the front girder vertical plate and the rear girder vertical plate is located at a non-stress concentration point position of the vehicle frame girder.

[0009] Furthermore, a number of reinforcing ribs are added to the outer side wall of the girder vertical plate, all of which are perpendicular to the upper wing plate and the lower wing plate.

[0010] Compared with the prior art, the utility model has the following beneficial effects: The structure of the utility model is simple and reasonable. Through the two-section splicing structure, it can not only increase the strength and bearing capacity of the goose neck part of the girder, improve the loading weight of the semi-trailer, but also effectively avoid the uneven painting during the electrocoating and powder spraying process of the vehicle frame, avoid the influence of the remaining electrocoating residues, and improve the production efficiency and product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0012] Figure 2 is a schematic diagram of the structure of the girder assembly in the utility model;

[0013] Figure 3 is a rear side view of the girder vertical plate in the utility model;

[0014] Figure 4 is Figure 1 an enlarged view of part A in

[0015] In the figure: 1, girder vertical plate; 2, upper wing plate; 3, lower wing plate; 4, reinforcing rib; 5, reinforcing vertical plate;

[0016] 11, front of the girder vertical plate; 12, rear of the girder vertical plate; 13, weld joint. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] It should be noted that in the description of the present utility model, terms such as "upper", "lower", "left", "right", "front", "rear", "inner side", "outer side", "front end", "rear end", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only relationship terms determined for the convenience of describing the structural relationship of each component in the present utility model, and do not specifically refer to any component in the present utility model having a specific orientation, being constructed and operated in a specific orientation, and should not be construed as a limitation to the present utility model.

[0018] In addition, in the description of the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0019] The following further describes in detail the specific embodiments of the present utility model with reference to the drawings:

[0020] As Figure 1 and Figure 2 shown, a spliced girder with a thick neck and a thin body is applied to the gooseneck semi-trailer frame. It includes a girder vertical plate 1, an upper wing plate 2, and a lower wing plate 3. Among them, the girder vertical plate 1 includes a front girder vertical plate 11 and a rear girder vertical plate 12. The rear end of the front girder vertical plate 11 is sequentially connected and fixed to the front end of the rear girder vertical plate 12, so that the front girder vertical plate 11 and the rear girder vertical plate 12 are on the same axis. The front girder vertical plate 11 is directly formed by integrally molding a plate with a thickness of 10 mm and is in the shape of a gooseneck. The rear girder vertical plate 12 is formed by integrally molding an original plate with a thickness of 5 mm and is in a rectangular structure. The upper and lower cross-sectional heights of the rear end of the front girder vertical plate 11 are the same as those of the rear girder vertical plate 12, and the two are welded and fixed. When welding, the inner side surfaces of the front girder vertical plate 11 and the rear girder vertical plate 12 are flush, and their outer side surfaces are spliced in a convex step shape at the weld 13, as Figure 3 shown.

[0021] The above-mentioned upper wing plate 2 and lower wing plate 3 are each made of a single plate and are respectively fixedly installed on the upper end surface and the lower end surface of the girder vertical plate 1, being relatively parallel to form an I-shaped girder assembly. The welded connection between the upper wing plate 2 and the girder vertical plate 1 has a large arc transition, and the welded connection between the lower wing plate 3 and the girder vertical plate 1 also uses a large arc transition to increase the connection and fixing strength.

[0022] The front girder vertical plate 11 at the gooseneck directly uses a 10-mm thick plate, which can effectively increase its strength and does not require a web to be added on its outer side, effectively overcoming the problem of residual blockage during electrophoretic powder spraying. At the same time, combined with Figure 4 shown, a relatively vertical vertical strengthening plate 5 is welded and fixed on the outer side of the weld 13, which can well block the stepped and uneven weld splicing, improve the appearance beauty of the entire girder, and also well improve the overall strength.

[0023] In a further optimized technical solution, the weld 13 between the front girder vertical plate 11 and the rear girder vertical plate 12 is within the range of the horizontal beam of the overall frame and is at a non-stress concentration point of the frame girder, avoiding problems such as stress fracture. At the same time, a plurality of strengthening ribs 4 are also welded and fixed on the outer side wall of the girder vertical plate 1. The upper and lower ends of the strengthening ribs 4 are respectively welded to the upper wing plate 2 and the lower wing plate 3 and are perpendicular to the upper wing plate 2 and the lower wing plate 3 to improve the bearing strength.

[0024] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions, or substitutions made by those skilled in the art within the essence of the present invention should also fall within the protection scope of the present invention.

Claims

1. A spliced girder with a thick neck and a thin body, characterized in that: It includes a girder vertical plate, an upper wing plate and a lower wing plate. The girder vertical plate includes a front part of the girder vertical plate and a rear part of the girder vertical plate. The rear end of the front part of the girder vertical plate is sequentially connected and fixed to the front end of the rear part of the girder vertical plate. The upper wing plate and the lower wing plate are both of one-piece forming structures and are respectively welded and fixed to the upper end face and the lower end face of the girder vertical plate, presenting an I-shaped overall; the thickness of the front part of the girder vertical plate is greater than that of the rear part of the girder vertical plate. When they are fixed, the inner sides are flush and the outer sides are spliced in a stepped shape.

2. The spliced girder with a thick neck and a thin body according to claim 1, characterized in that: The front part of the girder vertical plate is directly integrally formed by using a plate with a thickness of 10 mm, and the thickness of the rear part of the girder vertical plate is 5 mm.

3. The spliced girder with a thick neck and a thin body according to claim 2, characterized in that: The rear end of the front part of the girder vertical plate is welded and fixed to the front end of the rear part of the girder vertical plate. The welding position between the two is at the horizontal beam of the overall vehicle frame, and its upper and lower widths are equal.

4. A spliced girder with a thick neck and a thin body according to claim 3, characterized in that: A vertical strengthening vertical plate is welded and fixed to the outer side of the welding seam between the front part of the girder vertical plate and the rear part of the girder vertical plate, perpendicular to the upper wing plate and the lower wing plate.

5. A spliced girder with a thick neck and a thin body according to claim 3, characterized in that: The welding seam between the front part of the girder vertical plate and the rear part of the girder vertical plate is at a non-stress concentration point position of the vehicle frame girder.

6. The spliced girder with a thick neck and a thin body according to claim 1, characterized in that: Several strengthening ribs are added to the outer side wall of the girder vertical plate, all perpendicular to the upper wing plate and the lower wing plate.

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