JPH0268688U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is an end view showing a drive module used in an embodiment of the present invention, Fig. 2 is a sectional view of the embodiment device along the αοβ fold line in Fig. 1, and Fig. 3 shows the applied voltage timing of this embodiment. FIG. In the drawing, 1a and 1b are fixed rings, 2a and 2b
3a, 3b, 4a, 4b are laminated piezoelectric actuators, 5a, 5b are ring-shaped piezoelectric elements, 6a, 6b are breathing vibration rings, 7 is a rotor shaft, 8a, 8b are lining materials, A, B is the drive module.

Claims (1)

[Scope of utility model registration request] A highly rigid fixed ring, a torsional vibration ring fitted into the inner peripheral surface of the fixed ring so that it can freely vibrate along the circumferential direction, and a torsional vibration ring that expands and contracts along the circumferential direction due to changes in applied voltage. A piezoelectric component that vibrates along its axis, a ring-shaped piezoelectric element that is fitted into the inner peripheral surface of a torsional vibration ring and expands and contracts along the radial direction by changing the voltage value applied along the radial direction, and an inner ring-shaped piezoelectric element that vibrates along the radial direction. A breathing vibration ring that is fitted into the circumferential surface and elastically deforms along the radial direction, and a rotor shaft that is inserted into the vibration ring through a gap that is smaller than the amount of elastic deformation of the breathing vibration ring along the radial direction. Features a piezoelectric rotary drive device.