| 摘要 |
The invention relates to the field of mechanical and aeronautical engineering and can be used in actuators for automatic aircraft control systems, robotic systems, antenna systems and other electromechanical power systems. The electromechanical actuator consists of the following, arranged concentrically: a housing, an electric motor, a two-stage harmonic drive with an input shaft that is connected to the shaft of the electric motor; an eccentric unit; a cage of the first stage of the harmonic drive with rolling elements that can be moved relative to a wave generator in the circular spline of the first stage; a cage of the second stage with rolling elements that can be moved relative to a second wave generator by rings disposed on the circular spline; an output shaft with a position sensor, which shaft rests on the rolling elements and on rolling bearings; units for controlling the working of the actuator: a locking device, the stator of which comprises two pairs of magnets and windings and the armature of which is connected to the shaft of the electric motor; and a sensor for sensing the position of the rotor of the electric motor. The electric motor is situated inside the aforementioned circular spline, the eccentric unit of the first stage is situated outside the rotor of the electric motor, the hollow output shaft, which has grooves on the inside surface thereof, is connected to the cage of the second stage and has a hollow hub with a flange that is connected to the object to be actuated, said hub having a grooved part with a grooved sleeve that has a collapsible spiral disposed therein, and an explosive cartridge for ejecting the sleeve from the hub. |
