Electromechanical linear actuator with harmonic gear driving mechanism

A trim horizontal stabilizer actuator comprising:

• an electromechanical linear actuator comprising:
• a rotary shaft;
• a harmonic drive gear arrangement extending radially outwardly of and coaxially with the rotary shaft, the harmonic drive gear arrangement comprising:
• an outer annular spline driven in rotation by the electric motor;
• a flexible annular spline extending radially inwardly of the outer annular spline, the flexible annular spline having teeth on a radially outer surface thereof engaging with corresponding teeth on a radially inner surface of the outer annular spline;
• and
• a wave generating part extending radially inwardly of the flexible annular spline, the wave generating part being configured to engage with the rotary shaft so as to drive rotation thereof;
• an electric motor positioned radially outwardly of the harmonic drive gear arrangement,
• wherein the rotary shaft is configured to be driven by the electric motor via the harmonic drive gear arrangement with a gear ratio magnifying an output torque from the motor;
• and
• an output component configured to be driven along the rotary shaft in response to rotation thereof.