| 摘要 |
PURPOSE:To manufacture a motor which has a small size, a high output, and large output even at low speed by press-bonding a rotor to the end of a biresonance supersonic wave twist vibrator made of a plurality of piezoelectric elements coupled with a plurality of bendable vibrators having equal resonance frequency. CONSTITUTION:A rotor 17 secured to a rotational shaft 21 is press-bonded through a cap bolt 18 inserted with a coil spring 19 supported by a bearing 20 to the end 1' of an aluminum biresonator 1. Piezoelectric elements 2-5 (4, 5 are not shown), a washer 6, and a doughnut-shaped thick vibrator 7 are secured by the bolt 9 to the threaded hole of the rear end of the resonator 1 integrally. Leads 12-15 (14, 15 are not shown) are commonly used, a sinusoidal wave of 38kHz is applied between leads 16 to generate a twisting vibration to the end 1'. When the leads 10 of the vibrator 7 are connected with leads 12-15 and the leads 11 is connected with the lead 16, a twisting elliptical motion is generated at the end 1'. Thus, a strong rotary force is generated at the rotor 17 at a low speed. |
