Friction management brake shoe

摘要

The present invention provides a friction management brake shoe (10) adapted to engage the tread and the flange of a wheel of a railway vehicle via which the railway vehicle is guidably supported on a railed track. The friction management brake shoe (10) comprises a backing plate (2) having a flange member (8). There is a brake lining (6) affixed to the backing plate (2) and having a braking surface engageable with the wheel tread of a railway vehicle. The brake lining (6) includes a first friction composition material formed with at least one of a solid high positive friction modifier and a solid very high positive friction modifier which establishes a required friction level between the wheel tread and the railed track for stopping a train. The brake shoe (10) also has a flange part affixed to the flange member (8) of the backing plate (2), such flange part having a friction surface engageable with the wheel flange of a railroad car wheel. The flange part includes a second friction material (12) formed with a solid low coefficient of friction modifier which establishes a friction level of between about 0.08 and 0.15 at an interface between the wheel flange and the railed track. <IMAGE>