Piezoelectric driving motor

Abstract

The invention discloses a piezoelectric driving motor, comprising a central shaft and an output wheel, wherein a piezoelectric output module is radially connected between the output wheel and the central shaft; the piezoelectric output module comprises a piezoelectric ceramic block capable of electrifying and outputting radial displacement; and a flexible hinge assembly capable of converting the output radial displacement to a tangential displacement by limiting the position of the piezoelectric ceramic block. the integral structure of wheel-axle type is adopted, the piezoelectric output pairis arranged between the wheel and the axle to rotate and drive the output wheel to achieve continuous output, which is equivalent to increasing the output step distance; The piezoelectric ceramic block is elongated radially in the electrified state, the displacement conversion action of the flexure hinge assembly converts the output radial displacement into the tangential displacement, The precision of displacement output is maintained by the displacement amplification of the flexure hinge under the condition of increasing the magnitude of the output displacement. The precision of the flexurehinge is guaranteed by the design of the flexure hinge to reduce the requirement of the piezoelectric itself. The structure of the flexure hinge is simpler than that of the more mature inchworm-type transmission, and has the advantage of long-step continuity.

Description

technical field [0001] The invention relates to the technical field of piezoelectric displacement output, and more specifically, relates to a piezoelectric drive motor. Background technique [0002] With the development of science and technology, people's demand for high-precision automatic control is increasing. The requirements for motors are also constantly improving. The development of traditional electromagnetic motors has a history of more than 100 years, and various technical achievements have been perfected. Due to the limitations of working principles and structures, it is difficult to meet the needs in complex and harsh environmental conditions, such as Large torque, small size, high resolution, low speed, low noise, no electromagnetic interference, etc. In order to solve the structural problems of traditional motors, a structural design of piezoelectric ceramic output displacement is proposed. Piezoelectric ceramics are less affected by harsh environments, It has...

AI Technical Summary

Problems solved by technology

[0005] In view of this, the object of the present invention is to provide a piezoelectric drive motor whose structural design can effectively solve the problems of high material requirements, complex control structure and limited output displacement of the motion output device using the piezoelectric principle. other technical issues

Images