A modern low-floor tram can consist of several sections, which constantly change position relative to each other during movement. On a straight section of the path, in a turn, on a slope and during the passage of irregularities, the connection must maintain controlled kinematics, and the passenger must be able to safely move around the cabin.
Therefore, several systems operate simultaneously in the articulation zone. Mechanical node connects vehicle sections, and flexible Bellows (TV series) forms a protected passenger space and allows the bodies to move relative to each other. In the Hübner product line, both directions are represented by solutions for Multi-section trams (disambiguation).
The syllable is: flexible shell between sections
The wave bellows are part of an intersectional connection. It allows mutual movement of bodies, forms the passage of passengers and at the same time performs the functions of noise and thermal insulation and protection of the internal space from precipitation, dust and wind.
However, the bellows is not a universal "harmony", which can be transferred from one platform to another without additional study. The design materials clearly indicate that the design is developed taking into account the geometry of the joint, dimensions, operating conditions and technical requirements of a particular vehicle.
The articulation system: Mechanics of Section Movement
Another part of the — system of articulation nodes operates under a flexible shell. Hübner produces upper and lower nodes for trams. In the materials of the enterprise, the upper systems are described as solutions that provide various combinations of rotation, inclination and longitudinal movements of sections. Their task — reliably and flexibly connect vehicle segments when driving.
For these products, the same models of multi-section trams as for bellows are indicated. This is fundamentally important: The passenger sees, first of all, a flexible transition shell, but the operational properties of the joint zone are created by the joint work of several components.
That is why for the tram direction it is logical to talk not about individual details, but about the Solution for Connecting Sections. It shall at the same time ensure the necessary body movements, the safety of the passenger passage, the protection of the elements and the normal operation of the vehicle.
For a specific transport project
The tram market shows well why the manufacturer needs to combine engineering and production work. Even within one class of multi-section machines differ in the length and layout of sections, body structure, kinematics and operating conditions. Therefore, the transition from one project to another requires checking the initial parameters and, if necessary, adapting the solution.
In the general structure of the site for trams are also provided Electrical wiring systems and other components of urban electric transport, but full-fledged confirmed cards in the available materials are now presented in the most detail for Bellows and articulation systems. This should remain the basis of the article, without artificially expanding the list of products.
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