Stabilized railway freight car truck

摘要

A stabilized railway car truck consists of two side frames and a holster. The bolster has laterally opposite ends, each end extending into and supported within a side frame opening on a spring group. The stabilized railway car truck also includes a transom extending into, and supported within, a side frame opening. The spring group is supported at each transom end. Each side frame has a pedestal opening at each end that receive a rotating lug to accept a elastomeric steering pad and bearing adapter. The attachment of the side frames and transom is a rigid pivotal connection. Friction shoes between the side frames and bolster provide damping of an initial low to a high rate friction once engaged. The pivotal decoupling of the side frame and transom, and the lateral movement of the friction shoes to the bolster, eliminates track displacement irregularities from reacting at the bolster and into the vehicle.

主权项

1. A railway freight car truck comprising:
a pair of parallel sideframes, a transom extending laterally between the sideframes, a bolster extending laterally between the sideframes, each sideframe including a support surface, a transom bearing supported on each sideframe support surface, each sideframe also including a lower support which is adjacent an end of the transom bearing, a transom support bearing supported on each transom bearing, and an end of the transom supported on each transom support bearing, a spring group supported by an end of the transom, a bolster end supported by the spring group, a pair of axles extending laterally between the sideframes, each sideframe having a pedestal formed at an end of the sideframe, an axle bearing fitted to an end of each axle, a bearing adapter fitted on each axle bearing, a steering pad fitted on each bearing adapter, a rotating lug fitted on each steering pad, and an axle support bearing fitted on each rotating lug, the axle support bearing supporting the axle bearing, wherein each sideframe includes two vertical columns, and a wearplate affixed to each sideframe vertical column, and each bolster end includes two sloped surfaces, each bolster sloped surface and each sideframe vertical column forming a friction shoe pocket therebetween, a friction shoe in each friction shoe pocket, the friction shoe including a vertical face adjacent one of the sideframe wearplates and a sloped face adjacent one of the bolster sloped surfaces, a recess in each friction shoe vertical face, a low friction insert located in the friction shoe vertical face recess, and a high friction insert located adjacent the low friction insert such that the high friction insert extends outwardly from the recess beyond the vertical face of the friction shoe to engage the sideframe column wear plate.