PIEZOELECTRIC MOTOR USING CANTILEVER BEAM SUPERSONIC ELLIPTICAL VIBRATOR

摘要

PURPOSE:To obtain a large moving torque with light weight and compactness by press-bonding a moving element to the free end of a cantilever and applying a moving torque of the direction along the bending direction of the cantilever beam in the press-bonding surface of the moving element. CONSTITUTION:A cantilever beam 1 is of part of aluminum in the shape erected from the beam 12 in an inverted T shape on a circular base 12. Piezoelectric thickness vibrators 31, 32 for exciting the beam is formed of thickness vibrators made of doughnut-shaped Pb(Zr-Ti)O2 ceramic, and when a sinusoidal voltage is applied to the vibrators 31, 32 through leads 71, 72 connected with terminal boards 42, 43, the thickness vibrations of the vibrators 31, 32 produce deflecting vibration of the base 12, thereby causing the vibration of the end of the beam 12 to draw an elliptical motion.