CRAWLER VEHICLE TRANSMISSION Russian patent published in 1995 - IPC

FIELD: crawler vehicles. SUBSTANCE: transmission has main drive in form of planetary final drives (reduction gears) whose epicycles are inter coupled and coupled through gearbox with vehicle engine; carriers are coupled with driver of vehicle and, through brake, with transmission housing; sun gears are coupled, through corresponding end gears of intermediate shaft and idler gear, with auxiliary drive, particularly, with gear of output shaft of hydraulic motor of positive displacement hydraulic transmission furnished with coupling and coupled with engine. Novelty in design of transmission is that it has second positive displacement transmission whose pump is kinematically coupled with vehicle engine and gear of hydraulic motor output shaft is installed on shaft for rotation and is coupled with shaft through two-position clutch and with gear additionally secured on intermediate shaft. Clutch of first positive displacement transmission is secured on intermediate shaft and is coupled with end gear installed on shaft for rotation. This gear engages with idler gear. EFFECT: stepless smooth creeping speed in any gear. 3 dwg