DRIVE Russian patent published in 2004 - IPC

FIELD: mechanical engineering, in particular, equipment used in automatic system drives for propulsions, drives for antennae of acceleration blocks. SUBSTANCE: drive has casing 1, output shaft 3, engine 4 with shaft 5, n sensors 7 for sensing position of output shaft 3, planetary reducer 6 with central toothed gear 11 having Z teeth. Shaft 5 is connected with shaft 3 through reducer 6 whose gear 11 is mounted on shaft 3 and is meshed with gear 10 of sensor 7. Casing 1 is manufactured from material having thermal expansion coefficient of α = (α_sz_s+α_cz_c)/(z_s+Z_c), where α_s is thermal expansion coefficient of material of toothed gear 10, α_c is thermal expansion coefficient of material of central toothed gear 11. According to particular embodiment, toothed gears 10 and 11 and casing 1 of drive may be made from materials having equal thermal expansion coefficients, in particular, from aluminum alloy. EFFECT: increased precision in measuring of output shaft position. 3 cl, 3 dwg