| 主权项 |
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; 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. |
