| 摘要 |
An improved rail car moving vehicle adapted for travel alternately in one mode on rail wheels on a railway track and in an off-track mode on ground wheels, with weight transfer capabilities from a coupled railway car when in the on-rail mode, and characterized by improvements, including: a tricycle configuration of ground wheels provided by a pair of non-steerable, closely-spaced rear road wheels adapted to have frictional driving engagement with the driven axle of a rail wheel set and relatively widely-spaced steerable front ground wheels; a frame design that provides ample strength with respect to a bending or vertical load while having torsional rigidity not sufficient to normally cause one of the rail wheels to lift off from the track more than the radial dimension of its flange; a rear coupler assembly including a coupler carrier independently hinged to the vehicle frame for supporting a laterally swinging coupler independently pivoted to the frame at the inner end of the coupler arm; a pair of steerable road wheels spaced outboard of the vehicle frame and adjacent rail wheels and mounted on caster means supported from a pivot pipe with a tie rod interconnecting the steering levers; and, crank shafts mounted on opposite ends of a transverse-driven axle disposed above the axles of the front and rear rail wheel sets whereby side rods of inverted V configuration interconnecting the rail wheels with the crank arms on opposite ends of the driven axle, even in their lowest position, have adequate road bed and rail clearance and a final drive gear on the axle and a disc brake rotor mounted thereon can have relatively large diameters. |
