초록 ▼

A rotary actuator for converting electrical energy into rotating torque comprises a stator, a rotor, a pair of annular first piezoelectric elements contracting and expanding in the radial direction in response to the application of an electrical signal, and a plurality of second piezoelectric elemen

A rotary actuator for converting electrical energy into rotating torque comprises a stator, a rotor, a pair of annular first piezoelectric elements contracting and expanding in the radial direction in response to the application of an electrical signal, and a plurality of second piezoelectric elements disposed between the first piezoelectric elements and a holding portion of the stator for causing displacement of the first piezoelectric elements in the circumferential direction in response to the application of the electrical signal. These piezoelectric elements are alternately energized to continuously rotate the rotor.

대표청구항 ▼

A rotary actuator for converting electrical energy into rotating torque comprising: a stator; a rotor supported by said stator so as to be rotatable relative to said stator; a holding member provided on said stator so as to extend toward said rotor; annular first drive means disposed on both sides o

A rotary actuator for converting electrical energy into rotating torque comprising: a stator; a rotor supported by said stator so as to be rotatable relative to said stator; a holding member provided on said stator so as to extend toward said rotor; annular first drive means disposed on both sides of said holding member for clamping and releasing said rotor by making expansive and contractive deformations in the radial direction thereof; second drive means disposed between and fixed to said first drive means and said holding member for causing rotary movement of said first drive means around said rotor; and means for applying an energizing voltage to said first and second drive means.