FIELD: machine building.
SUBSTANCE: invention relates to gear transmissions. Planetary gearbox with external arrangement of brake coupling provides gear shifting without engagement of all gears. Number of gears is determined by number of planetary and ring gears. Sun gear is fixed on input shaft and transmits torque to planetary gear, which is fixed on shaft with possibility of rotation together with other planetary gears. All ring gears have possibility of running and braking relative to gearbox housing. Enabling transmission is performed at braking of one of ring gears with help of brake coupling. Gearbox does not require clutch. Gearbox housing is used for support of braking gears.
EFFECT: higher reliability and durability of design.
1 cl, 5 dwg
