Стенд для испытания трансмиссий с замыканием силовогоконтура кривошипными механизмами

This article describes design of testing stand for life, control, comparative and lab-research tests of powertrains of caterpillar tractors at mode of changing loadings. Mode of loading of testing powertrain is relating to one of standard operational modes for power transmission of agricultural caterpillar tractor – mode of correction of motion direction (execution of small turns) is implemented on stand due features of kinematics of locking element – crank joint four-elements parallelogram mechanism. During this mode loading of details of one powertrain side turn out to be two times greater than during longitudinal motion. Stand includes two equal transmissions mounted towards one to another. The first one is testing, the second is technological. Constant level of loading in locked power circuit of the stand is set by loading mechanism connected to pulleys of planet brakes of technological transmission and law of changing of load – by kinematic of locking elements. There are computations of kinematic and force parameters of those elements in article.