RUDDER UNIT OF MISSILE OR PROJECTILE Russian patent published in 2021 - IPC F42B10/62 

FIELD: astronautics.

SUBSTANCE: invention relates to the field of rocket equipment, namely to control drives of aerodynamic surfaces of missiles or projectiles. Unit of steering drives of missile or projectile consists of common housing, four actuators, each of which includes an electric motor, a set of mechanical transmissions, a feedback sensor and a support device of the shaft of the aerodynamic surface, which is rigidly connected to the shaft of the output link of the output mechanical transmission. Common housing is made of two parts: external and internal, connected by partitions. Outer part is a component part of the body of the rocket or projectile, and the inner part has the shape of a parallelepiped with a central longitudinal hole. Actuators use high-speed electric motors, power parameters of which are achieved due to length at which outer diameters of four engines are inscribed in inner diameter of outer common housing. Mechanical transmissions include gears connected in the following sequence from the electric motor: planetary, conical, cylindrical and wave gears with rolling elements made as per the scheme with output rigid wheel. Gear ratios of mechanical transmissions are distributed so that transfer number of wave gear is realized with external diameter of rigid wheel, which is inscribed in sector of external part of housing with angle of 90°. Gear ratio of the planetary gear is realized with outer diameter not exceeding the outer diameter of the electric motor, and the rest mechanical transmissions complete the total gear ratio to the required value. Support device of each aerodynamic surface is formed by rolling elements of wave transmission, located in separator inside rigid wheel, and two rows of solids of contact, contacting with grooves of rigid wheel, located on its outer surface on opposite sides of gear rim kinematic pair of communication with feedback sensor, and annular tracks located in partitions of housing, having shape of shells.

EFFECT: invention allows controlling the missile or projectile of small diameter at high aerodynamic loads.

1 cl, 2 dwg