FIELD: mechanical engineering. SUBSTANCE: stepless mechanical transmission has multidisc torque transformer and gear-type differential. Transformer and differential are coupled to input shaft through pair of gears. Transformer shaft is coupled to one of differential gears. Other gear of differential is coupled to output shaft. Transformer is suspended from supports of input shaft on cantilevers and is coupled to automatic control system of transmission through hydraulic drive. Mechanical transmission makes if possible to extend range of gear-ratio stepless variation with transition through zero frequency. Reversing is also provided. EFFECT: enhanced efficiency. 1 dwg
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