Self-steering railway truck

A railway truck comprising:

• a frame including a pair of laterally spaced apart side frames and a plurality of longitudinally spaced apart transoms extending laterally between and integrally joined to said side frames;
• a plurality of journal boxes resiliently suspended from said side frames;
• a pair of first and second longitudinally spaced apart end axles extending laterally between said side frames and having opposite ends rotatably mounted in respective ones of said journal boxes;
• a pair of longitudinally spaced apart bellcranks rotatably joined to each of said side frames between said end axles, each of said bellcranks having a vertically extending crankshaft and a crank arm extending radially outwardly therefrom;
• a pair of traction links extending longitudinally along each of said side frames, with each of said traction links being pivotally joined between respective ones of said journal boxes and said crank arms for carrying tension and compression traction loads therebetween;
• a pair of adjoining reaction arms extending longitudinally along each of said side frames, with each of said reaction arms having longitudinally opposite proximal and distal ends, and each of said proximal ends being fixedly joined to a respective one of said crankshafts, and said distal ends adjoining each other;
• means for operatively joining together said adjoining reaction arm distal ends for carrying lateral reaction loads between each of said reaction arm pairs upon rotation of said crankshafts while permitting differential longitudinal and pivotal movement between said adjoining distal ends;
• and
• wherein traction loads are carried in turn through said end axles, journal boxes, traction links, and bellcranks to said side frames, with said end axles being self-steering in a yaw direction so that yaw of said first end axle corotates together corresponding ones of said bellcranks on opposite sides of said frame which in turn corotate together said reaction arms joined thereto which cantilever to counterrotate together said adjoining reaction arms to counterrotate together said bellcranks joined thereto to counter-yaw said second end axle.