Bus with idler gear mechanism

The invention provides a bus with an idler gear mechanism, comprising a power car and a tractor, wherein the power car and the tractor are connected through an articulated shaft; first track wheel mechanisms are arranged at the bottom of the power car and the tractor, and two sets of second track wheel mechanisms are arranged between the two sets of the first track wheel mechanisms; and the frontand rear frames are adopted and the hydraulic steering system is cooperated to realize flexible steering on the highway. The bus with an idler gear mechanism has the advantages that: the bus with an idler gear mechanism can ensure that no traveling resistance will be generated during the turning process of the high-speed railway car, and allows for smaller corners; the first track wheel mechanismsand the second track wheel mechanisms are respectively arranged at the bottom of the power car and the tractor; and the second track wheel mechanisms are positioned between the first track wheel mechanisms, thereby reducing t