CRAWLER VEHICLE TRANSMISSION Russian patent published in 1995 - IPC

FIELD: crawler vehicles. SUBSTANCE: brakes of second and third links of final drive planetary summing rows are made, each, in form of hydraulic pummp. Inlet and outlet spaces of pump communicate through closed hydraulic main line furnished with adjustable throttling valve. Each closed hydraulic main line has cooler. Inlet and outlet spaces of third link hydraulic pump of each planetary row are coupled additionally by second closed hydraulic main line with adjustable throttling valve and hydraulic pump, hydraulic pumps of second hydraulic main lines being kinematically coupled. EFFECT: smooth control of speed from zero to maximum value at any gear. 3 cl, 1 dwg