Railcar-mover vehicle
Disclosed herein is a railcar-moving vehicle having a highway mode for operation on roadways, and a rail mode for operation on rails. The railcar-moving vehicle including a support system, at least one drive axle with rubber tried drive wheels, and at least one pair of steering tires and two spaced apart rail bogies suspended by the support system. The railcar-moving vehicle including a weighted sled frame slidably mounted to the support system, the sled frame translatable between the front end and the rear end of the support system for optimizing weight distribution for increasing traction by the bogies when in rail mode. The bogies retained in an elevated and stowed position during highway mode and in a lowered position when in rail mode.
1. A method of operating a railcar moving vehicle, the method comprising;
fabricating a truck comprising;
(a) a cab;
(b) frame rails;
(c) at least one drive axle with at least one rubber drive tire at each end of the drive axle;
(d) a pair of steering wheels with a corresponding steering axle;
(e) longitudinally extending support members mounted to the frame rails;
(f) a first bogie with at least one wheelset, the first bogie mounted either (i) to the support members between the steering axle and the at least one drive axle, or (ii) to the frame rails forward of the steering wheels, the first bogie repositionable between an elevated highway mode and a lowered on-railroad track mode;
(g) a second bogie with at least one wheelset, the second bogie mounted to the support members rearward of the drive axle, the second bogie configured to be repositionable between the highway mode and the on-railroad track mode;
(h) a weighted sled frame slidably mounted to the support members, the weighted sled frame repositionable along substantially the entire longitudinal extent of the support members; and
(i) a coupler configured to vertically actuate;
driving the railcar moving vehicle with the first and second bogies in highway mode to a railroad crossing;
locating the second bogie over the railroad tracks associated with the railroad crossing;
repositioning the at least one wheelset of the second bogie onto the railroad tracks;
moving the weighted sled frame to a rearmost position on the support member to shift weight away from the pair of steering wheels;
lowering the second bogie wheelset to engage the railroad tracks and elevating the support members and frame rails;
moving the rear of the vehicle with the second bogie to parallelism with the railroad tracks and aligning with the use of the steering tires, the first bogie over the railroad tracks;
lowering the at least one wheelset of the first bogie to on-railroad track mode to raise the steering tires off the railroad tracks;
repositioning the weighted sled frame along the length of the support member to optimize load balancing to minimize slippage of the wheelsets of the first and second bogies;
transiting the vehicle to the location of at least one of (i) a rail car and (ii) a locomotive to be towed;
coupling the railcar moving vehicle with the coupler to at least one of (i) the locomotive and (ii) the railcar;
raising the coupler to transfer weight to the second bogie;
repositioning the weighted sled frame along the length of the support member to optimize total towing capacity; and
pulling the at least one railcar or locomotive to a desired location.
2. The method of operating the railcar moving vehicle of claim 1 , wherein actuators reposition the first and second bogies between highway mode and the on-railroad track mode positions.
3. The method of operating the railcar moving vehicle of claim 1 , wherein operational equipment comprises a significant portion of the weight applied to the sled frame.
4. The method of operating the railcar moving vehicle of claim 3 , wherein the actuatable coupler transfers weight from the at least one railcar to the second bogie thereby increasing the tractive force of the wheelset of the second bogie.
5. The method of operating the railcar moving vehicle of claim 4 , wherein the weighted sled frame is positionable over the first bogie to further increase the tractive force of the wheelset of the first bogie.
6. The method of operating the railcar moving vehicle of claim 1 , wherein when in on-railroad track mode the wheelsets may optionally be (i) driven by a drive motor, or (ii) in freewheel mode without any drive power supplied by the drive motor.
7. The method of operating the railcar moving vehicle of claim 1 , wherein when in on-railroad track mode the vehicle may operate (i) with the rubber drive tires engaged with the railroad tracks while the wheelsets are driven by the drive motor to maximize pulling power, (ii) with the rubber drive tires engaged with the railroad tracks while the wheelsets are in freewheel mode to increase the speed of the vehicle on the tracks, and (iii) with the rubber drive tires out of contact with the railroad tracks.