Urban Transportation Development Corporation Limited

Canadair Limited

George Sobolewski

A railway truck assembly adapted to produce steering of the wheel axles radially to a curve to reduce wear and noise and characterized by a pivot connection between the bolster and the truck frame elements which; in cooperation with direct transmission of the load to the truck frame through the opposite ends of the bolster, allows to use a relatively thinner and centrally non-bulging bolster. Thus, more space is made available between the central portion of the bolster and the top of the rails; which space is advantageously used to install some equipment such as for instance a linear induction motor or LIM. This railway truck assembly comprises a bolster which is substantially bodily displaceable with the car body, a pair of side frames, laterally restrained relative to the bolster and supporting the opposite ends respectively of the bolster, a pair of steering yokes longitudinally restrained relative to the car body and pivoted one to the other for radial steering of the wheel axles connected to them respectively, the side frame being slidably supported by the yokes and laterally restrained relative to the latter, and links producing the aforementioned restraints respectively.

Railway truck; pivotal connection

A steerable truck comprises a pair of wheelsets spaced apart along the longitudinal axis of the truck, each supporting a respective steering yoke. A main frame is supported by the yokes which are connected to the main frame to permit rotation of each yoke relative to the main frame about a respective vertical steering axis. A linear induction motor is located beneath the yokes for cooperation with a reaction rail to propel the truck. A suspension device suspends the motor from the yokes to maintain the motor a fixed height from the reaction rail. The thrust of the motor is transmitted to one of the yokes and a centering device is provided to inhibit lateral displacement of the motor relative to the yokes. The suspension device comprises three links each having universal connections at each end for connection to the motor and a respective one of the yokes. Two of the links are connected at spaced locations between one of the yokes and the motor and other of the links is connected between the other of the axle assemblies and the motor. The three point suspension so provided permits steering and torsional deflection between the yokes while vertically supporting the motor.

Railway steering truck linear induction motor assembly

A railway truck assembly adapted to produce steering of the wheel axles radially to a curve independently of mere lateral motions of the car body to reduce wear and noise and also featuring a pivot connection between the bolster and the truck frame elements which; in cooperation with direct transmission of the load to the truck frame through the opposite ends of the bolster, allows to use a relatively thinner and centrally non-bulging bolster. Thus, more space is made available between the central portion of the bolster and the top of the rails; which space is advantageously used to install some equipment such as for instance a linear induction motor or LIM. This railway truck assembly comprises a bolster which is substantially bodily displaceable with the car body, a pair of side frames, laterally restrained relative to the bolster and supporting the opposite ends respectively of the bolster, a pair of steering yokes longitudinally restrained relative to the car body and pivoted one to the other for radial steering of the wheel axles connected to them respectively, the side frames being slidably supported by the yokes and laterally restrained relative to the latter, and links producing the aforementioned restraints respectively.

Growing community of inventors

Laval, Canada

George Sobolewski