Patent ID: 7954574
Filing Date: 2011-06-07
Classification: B60K,B60L,B60Y,B62D,B66F,E02F,Y02P,Y02T

Abstract:
1. A utility vehicle comprising a frame; said frame includes two sides thereof each supporting a first chain driven wheel shaft having a sprocket for driving a forward wheel and a second chain driven wheel shaft having a sprocket for driving a rearward wheel; each side of said frames includes a chain drive shaft having two sprockets thereon for driving first and second chains, said chain drive shafts being in alignment with each other, said first chain intermeshing with one of said sprockets of said chain drive shaft and said sprocket for driving said forward wheel and said second chain intermeshing with said other sprocket of said chain drive shaft and said sprocket for driving said rearward wheel; two alternating current motors residing adjacent each other, each of said alternating current motors having an output shaft, said output shafts of said alternating current motors each include a pinion gear for driving a respective offset planetary gear reducer to effect speed reduction and increase torque; said alternating current motors controlled by a variable frequency drive to control the speed of said alternating current motors; each of said offset planetary gear reducers includes a stationary housing having a ring gear affixed thereto; each of said planetary gear reducers includes a carrier having at least one planetary gear intermeshing with said ring gear, and, said carrier includes an output spline; each of said planetary gear reducers includes a gear driven by said pinion gear of said output shaft of said alternating current motor, said gear driven by said pinion gear of said output shaft of said alternating current motor includes a portion having a sun gear thereon which intermeshes and drives said at least one planet gear of said carrier; each of said chain drive shafts includes a spline thereon which intermeshes with said output spline of said carrier and is driven thereby; said planetary gear reducers effecting a speed reduction in the approximate range of between 20-30:1; and, said chain drive sprockets in combination with said wheel shaft sprockets effecting a speed reduction in the approximate range of 2.5-5:1.