Truck track drive

Abstract

A truck track drive can include two rollers. The truck track drive can also include a tread configured to pass over top and bottom of a dual rear wheel assembly on a truck and to be moved by rotation of the dual rear wheels. The track drive can also include a compulsory drive unit.

What is claimed is: 
     
         1 . A track drive comprising:
 a first roller disposed at a front end of a tension rod;   a second roller disposed at a rear end of the tension rod;   a tread configured to pass over a top and a bottom of a dual rear wheel truck tire assembly and to pass over each of the rollers, the tread being powered by rotation of the dual rear wheel truck tire assembly;   a compulsory drive system having a toothed drive gear disposed between a first wheel and a second wheel of the dual rear wheel truck tire assembly, a chain and a driven gear coupled to the second roller, the second roller mechanically engaging the tread and causing it to move when the driven gear is turned; and   an outer shield member extending from the first roller to the second roller.   
     
     
         2 . A track drive comprising:
 a first roller disposed at a front end of a tension rod, wherein the tension rod includes a first portion and a second portion, each of the first and second portions having a threaded end;   a second roller disposed at a rear end of the tension rod;   a tread configured to pass over a top and a bottom of a dual rear wheel truck tire assembly and to pass over each of the rollers, the tread being powered by rotation of the dual rear wheel truck tire assembly; and   a compulsory drive system having a toothed drive gear disposed between a first wheel and a second wheel of the dual rear wheel truck tire assembly, a chain and a driven gear coupled to the second roller, the second roller mechanically engaging the tread and causing it to move when the driven gear is turned.   
     
     
         3 . A track drive comprising:
 a first roller disposed at a front end of a tension rod;   a second roller disposed at a rear end of the tension rod;   a tread configured to pass over a top and a bottom of a dual rear wheel truck tire assembly and to pass over each of the rollers, the tread being powered by rotation of the dual rear wheel truck tire assembly;   a compulsory drive system having a toothed drive gear disposed between a first wheel and a second wheel of the dual rear wheel truck tire assembly, a chain and a driven gear coupled to the second roller, the second roller mechanically engaging the tread and causing it to move when the driven gear is turned; and   a spacer disposed along the tension rod and coupled to the threaded end portions of the first and second portions of the tension rod, having internal threads configured to increase tension on the tension rod when rotated in a first direction and to decrease tension on the tension rod when rotate in a second direction.