HYDROMECHANICAL GEARBOX

摘要

A hydromechanical gearbox realizes nine forward motion gears and one reverse motion gear and comprises a hydrodynamic torque converter, a planetary reduction gear, three controllable brakes and three controllable clutches. In the planetary reduction gear, a planet carrier of a fourth planetary gear set is connected to a crown wheel of a third planetary gear set and to an output link. A sun wheel of the fourth planetary gear set is connected by a clutch to a sun wheel of a second planetary gear set. A main wheel of the fourth planetary gear set is connected to a planet carrier of the third planetary gear set and by a brake to the crankcase of the gearbox. The planet carrier of the third planetary gear set is connected by a clutch to the sun wheel of the second planetary gear set. A sun wheel of the third planetary gear set is connected to a main wheel of a first planetary gear set and by a clutch to a planet carrier of the second planetary gear set. The planet carrier of the second planetary gear set is connected by a brake to the crankcase of the gearbox. The sun wheel of the second planetary gear set is connected to an output element of the hydrodynamic torque converter and directly to an input link of the gearbox. A main wheel of the second planetary gear set is connected to a planet carrier of the first planetary gear set. A sun wheel of the first planetary gear set is connected by a brake to the crankcase of the gearbox.