FIELD: mechanical engineering; ground pump drives. SUBSTANCE: device has housing accommodating hydraulic pump with rocking plate, gear ratio changer and liquid flow distributor. Housing accommodating hydraulic pump is made rotating around longitudinal axis. Perforated output shaft of hydraulic pump is connected with rotating housing. Gear ratio changer is made in form of movable bushing. Bushing is located on perforated output shaft of hydraulic pump and is connected with adjusting lever. Rotating housing is placed in reservoir filled with working liquid and is provided with hole connecting reservoir space with hydraulic pump. EFFECT: simplified design, improved reliability. 1 dwg
