Roof edge beam of low-floor tramcar

Abstract

The invention discloses a roof edge beam of a low-floor tramcar. The roof edge beam comprises a boundary beam base body, and the edge beam base body is formed by combining hollow structure aluminum profiles formed through one-time extrusion. The cross section of the edge beam base body is of a hollow truss structure, the hollow truss structure is composed of a vertical hollow truss structure and atransverse hollow truss structure, and the transverse hollow truss structure is integrally connected to one side of the vertical hollow truss structure and forms a V shape with the vertical hollow truss structure. In this way, the hollow structure aluminum profile formed by one-step extrusion is adopted, a large amount of assembling, splicing and welding work is omitted, the overall structural strength of the edge beam base body is enhanced through the truss structure arranged in the aluminum profile, particularly, the cross section of the combined edge beam base body is of a V-shaped hollowtruss structure, transmission of longitudinal force and transverse force of the edge beam base body can be ensured, the structural strength and the bearing capacity of the edge beam base body are effectively improved, and the v meets the requirements for high strength and light weight at the same time.

Description

technical field [0001] The invention relates to the technical field of rail vehicles, in particular to a roof side beam of a low-floor tram. Background technique [0002] The tram is one of the important tools of modern urban rail transit. The roof is one of the important components of the tram body, and the roof carries a variety of tram electrical equipment, so the roof must meet the strength requirements. As the key component of the roof, the side beam is also the main load-bearing part of the roof, which must meet the design requirements of the vertical bearing capacity of the roof. However, the existing roof side beams are generally welded by weathering steel , in order to improve the bearing capacity of the side beam structure, the use of high-strength weathering steel materials is increased in the welding stress concentration, resulting in cumbersome assembly and welding processes, and there are defects such as poor weld fatigue performance and heavy quality. Conten...

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Problems solved by technology

[0002] The tram is one of the important tools of modern urban rail transit. The roof is one of the important components of the tram body, and the roof carries a variety of tram electrical equipment, so the roof must meet the strength requirements. As the key component of the roof, the side beam is also the main load-bearing part of the roof, which must meet the design requirements of the vertical bearing capacity of the roof. However, the existing roof side beams are generally welded by weathering steel , in order to improve the bearing capacity of the side beam structure, the use of high-strength weathering steel materials is increased in the welding stress concentration, resulting in cumbersome assembly and welding processes, and there are defects such as poor weld fatigue performance and heavy quality

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