Analysis of low-floor light rail bogies
Small light railway curve radius, low platform, thereby not only requires that the light rail vehicles have turned flexible connections, also called compartment and door low-floor structure is adopted to facilitate passengers, especially the elderly, children and people with disabilities getting on and off. But the lowering of the floor surface for transmission and running gear design is a big problem.
In 1986, France vehicle manufacturers making light rail vehicles for the city of Nantes on the 1th floor design attempts, the Middle floor height drop trailer for 350mm, but this type of light rail vehicles have certain limitations. After the passenger in the car, by the low-floor area to the higher floor area, but also through the 3 steps, so as to cause inconvenience to passengers. In order to solve this problem, GEC Alsthom Grobl, launched a new light rail vehicle structure, for a 3 car unit trains, train both ends of the train, for trailer (separate wheel). Articulated structure between compartments, 3-car low-floor opening the part low floor car floor 75%. In the design of light rail vehicles, mechanical parts of its key technologies include:
(1) car articulated structure at the junction.
(2) the carriage of low-floor structure.
(3) low floor bogie with independent wheels. European countries in the development of low-floor light rail vehicle at the same time, continue to introduce different types of bogies with independent wheels, its unique structure, the idea of a clever, well worth our reference. Below are introduced and analyzed.