JPH0272688U

JPH0272688U -

Info

Publication number: JPH0272688U
Application number: JP15108088U
Authority: JP
Priority date: 1988-11-18
Filing date: 1988-11-18
Publication date: 1990-06-04

Description

[Brief explanation of drawings]

添付図面は本考案の実施例を示し、第１図は縦
断側面図、第２図は超音波捩れ振動子１と圧電ア
クチユエータ８の信号波形図、第３図は本考案の
第一手段の一実施例を示す要部の縦断側面図、第
４図は本考案の第二手段を示す同図である。１；超音波捩れ振動子、２ａ，２ｂ；環状圧電
素子、３，４；金属ブロツク、８；圧電アクチユ
エータ、９；圧電素子、９ａ；銀電極、１１；ロ
ータ、１５；発条、２０；電極保護板、２１；耐
摩耗板。 The accompanying drawings show an embodiment of the present invention, in which Fig. 1 is a longitudinal sectional side view, Fig. 2 is a signal waveform diagram of the ultrasonic torsional transducer 1 and the piezoelectric actuator 8, and Fig. 3 is one of the first means of the invention. FIG. 4 is a vertical sectional side view of the main part showing the embodiment, and is the same view showing the second means of the present invention. 1; Ultrasonic torsional vibrator, 2a, 2b; Annular piezoelectric element, 3, 4; Metal block, 8; Piezoelectric actuator, 9; Piezoelectric element, 9a; Silver electrode, 11; Rotor, 15; Spring, 20; Electrode protection Plate, 21; wear-resistant plate.

Claims

[Claims for Utility Model Registration] (1) A laminated piezoelectric actuator is disposed on the end face of an ultrasonic torsional vibrator, and a rotor is further brought into contact with the laminated piezoelectric actuator, so that the ultrasonic torsional vibrator and the laminated piezoelectric An ultrasonic motor driven by an AC power source having a predetermined phase difference with an actuator, characterized in that an electrode protection plate that makes surface contact with the rotor is attached to the contact side end surface of the laminated piezoelectric actuator. sonic motor. (2) A laminated piezoelectric actuator is disposed on the end face of the ultrasonic torsional vibrator, and a rotor is brought into contact with the laminated piezoelectric actuator to create a predetermined phase difference between the ultrasonic torsional vibrator and the laminated piezoelectric actuator. In an ultrasonic motor driven by an AC power source, an electrode protection plate is attached to the contact side end face of the laminated piezoelectric actuator, and a wear resistant plate is in surface contact with the electrode protection plate on the contact side end face of the rotor. An ultrasonic motor characterized by pasting.