Chain of semi-trailer vehicles and associated articulated trainset

An articulated railway train comprising

• a. a main vehicle comprising a body, two bogies supporting the body, known as main bogies, and an inter-body joint carried by the body, and
• b. at least one chain of semi-trailer vehicles, intended to be articulated to a main vehicle, each semi-trailer vehicle comprising a body and a single bogie supporting the body, known as a trailer bogie, each trailer bogie being articulated with respect to the corresponding body along a vertical pivot axis, known as the bogie axis, one of the end vehicles of the chain, known as the first semi-trailer vehicle, being intended to be articulated to the main vehicle, the bodies of the semi-trailer vehicles being successively articulated to one another from the first semi-trailer vehicle of the chain by a separate inter-body joint, each inter-body joint being carried by one end of each semi-trailer vehicle connected to a following vehicle, each inter-body joint being articulated along a vertical pivot axis, each trailer bogie of a body carrying an inter-body joint being arranged longitudinally with respect to the body so that the bogie axis and the interconnection axis are offset, the first vehicle of the chain being articulated to the body of the main vehicle by the inter-body joint of the main vehicle,
• wherein one of the main bogies, the so-called first bogie, comprises two secondary suspensions and a single central back-up suspension, the other main bogie, the so-called second bogie, comprises two secondary suspensions and a back-up suspension specific to each secondary suspension, the first bogie and the second bogie defining only three support points for the body of the main vehicle when the secondary suspensions of the first bogie are malfunctioning,
• wherein each inter-body joint is a cross-axis ball joint which is a rubber and metal ball joint.