TURN DRIVE Russian patent published in 2008 - IPC B66C23/84 

FIELD: mechanics.

SUBSTANCE: invention can be used in devices designed for turning in a horizontal or vertical plane. The turn drive contains a tooth rim meshing with two identical main gears; the said rim is assembled on a turning portion of the object, this turning portion is installed with a support component on the base whereon an electric motor, a brake mechanism and a reducer are arranged. The electric motor via a coupling is connected to an input shaft of the reducer which includes a frictional mechanism to limit a maximum torque at the input shaft of the reducer, self braking worm gear and two differential mechanisms. Each of the differential mechanisms is made as a planetary drive equipped with an epicyclic gear, a sun gear, a carrier and satellites. One of the main gears is secured to the shaft made as one whole with the carrier of the first planetary gear, the axis of which is geometrically coupled with the central axis of the latter. The other main gear is fixed on the shaft installed in the case of the reducer; whereon the gear is attached meshing with the gear made as one whole with the epicyclic gear of the first planetary gear mechanism. The sun gear of the second planetary gear mechanism is connected to the shaft of the motor; epicyclic gear of the planetary gear mechanism by means of tooth meshing is kinematically tied to the above said friction mechanism. The sun gear of the first planetary gear mechanism is secured on the shaft which is kinematically tied with the carrier of the second planetary gear mechanism via the said self braking worm gear.

EFFECT: increased reliability of operation, improvement of dynamic and operational characteristics of a turn drive.

6 cl, 7 dwg