TRACTOR Russian patent published in 2010 - IPC B60K17/32 

FIELD: transport.

SUBSTANCE: invention relates to automotive industry. Tractor comprises body, transmission with planetary reduction gearboxes of wheel drive. Wheel drive runs in rolling bearings fitted on drive axle half shafts with their hubs secured are drive wheel disk and pinion frame with planetary reduction gearbox sun gears. Pinion frame crown gear is rigidly fixed relative to axle half shaft, while sun gear is splined to drive axle turning half shaft. Cover representing inner gearing toothed rim aligned with sun gear is rigidly coupled with planetary reduction gearbox pinion frame. Sun gear can slide on splines along rotating drive axle half shaft till coming out of mesh with pinion frame sun gears and subsequent engagement with said inner gearing toothed rim.

EFFECT: higher efficiency reduced oil consumption.

1 dwg