B - Operations – Transporting – 61 – F
Patent
B - Operations, Transporting
61
F
105/61
B61F 5/00 (2006.01) B61F 3/08 (2006.01) B61F 5/16 (2006.01) B61F 5/30 (2006.01) B61F 5/36 (2006.01) B61F 5/38 (2006.01) B61H 1/00 (2006.01)
Patent
CA 1057123
ABSTRACT OF THE DISCLOSURE A radial axle railway truck has a pair of wheel and axle assemblies with profiled wheel treads of greater than conventional conicity to steer the assemblies by means of the differential effect of the inner and outer wheel diameters on curved track, the axle bearings are located inboard of the wheels, and the truck frame side members are correspondingly located inboard of the wheels and there supported on the axle bearings such that longitudinally acting resilient restraint means between the axle bearings and the truck frame resist sub- stantial movements of the axles longitudinally of the truck frame while offering only limited resistance as a couple to steering movements of the axles with respect to the truck frame because of the relatively short transverse moment arm between the longitudinally acting resilient means. The inboard loca- tion of the axle bearings permits the use of straight links extending diagonally of the truck and pivotally connected at their ends to the diagonally opposite axle bearings to oppose hunting movements of the wheel and axle assemblies during movement along tangent track and to couple wheel-induced turn- ing movements of the wheel and axle assemblies in opposite directions on curved track so as to avoid interface with their self-steering ability. An equalized tread brake mechan- ism is provided to compensate automatically for the differences in longitudinal wheel spacing at the opposite sides of the truck on curved track. In a preferred form, the truck frame itself carries outboard springs yieldable in shear longitudi- nally and laterally of the truck, as well as vertically, to accommodate swivel and transversely of the truck to cushion the body from lateral track irregularities, the springs being adapted to support the car body directly, and a compatible longitudinal force-transmitting means, capable of accommodating vertical, lateral and swivel movements between the truck and car body, is provided between the truck frame and the supported car body.
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