Ultrasonic driving motor

H - Electricity – 02 – N

Patent

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Details

H02N 2/00 (2006.01) H01L 41/09 (2006.01)

Patent

CA 2089910

A rotor 2 comprises a resilient ring frame 2a having a separate portion 2c and having plural slide projection 2b. The slide projections are contacted with the edge face of the piezoelectric vibrator 1 by opening the separate portion 2c of the rotor 2. In the ultrasonic driving motor, when the AC power is applied to the electrodes of the piezoelectric vibrator 1, progressive wave is generated on the edge and side faces of the piezoelectric vibrator 1 and the rotor 2 is rotated with the progressive wave. Accordingly, a rotary shaft 4 is attached to a supporting member 3 and rotary power is taken out of the rotary shaft 4.

Rotor (2) comprenant une couronne annulaire résiliente (2a) présentant une partie séparée (2c) et ayant plusieurs projections coulissantes (2b). Les projections coulissantes sont en contact avec la face du bord du vibrateur piézoélectrique par l'ouverture d'une partie séparée (2c) du rotor (2). Dans le moteur d'entraînement ultrasonique, lorsque le courant alternatif est appliqué aux électrodes du vibrateur piézoélectrique (1), une onde progressive est générée sur le bout et sur les cotés du vibrateur piézoélectrique (1) et le rotor (2) tourne avec l'onde progressive. Selon l'invention, un arbre tournant (4) est attaché à un élément de support (3) et un mouvement de rotation est prélevé de l'arbre de rotation (4).

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