Piezoelectric actuator outputting dynamic micro angular displacement

Abstract

The invention relates to a piezoelectric actuator outputting dynamic micro angular displacement which comprises an output rod, a first spring slice and a second spring slice, a first T-shaped flexible restraint end connected with the first spring slice and a second T-shaped flexible restraint end connected with the second spring slice. The first spring slice and the second spring slice are respectively connected with upper and lower ends of two sides of the output rod. The first T-shaped flexible restraint end is connected in an external fixed frame through a first flexible hinge and a second flexible hinge on two sides of the first T-shaped flexible restraint end. The second T-shaped flexible restraint end is connected in an external fixed frame through a third flexible hinge and a fourth flexible hinge on two sides of the second T-shaped flexible restraint end. A first piezoelectric stack and a second piezoelectric stack are fixed on the first T-shaped flexible restraint end and the outer fixed frame. A third piezoelectric stack and a fourth piezoelectric stack are fixed on the second T-shaped flexible restraint end and the outer fixed frame. After forward voltage is exerted, length of the four piezoelectric stacks is prolonged and the two T-shaped flexible restraint ends are pushed to move to two sides so as to pull the two spring slices to two sides and consequentially, the output rod rotates around the symmetric center and micro angular displacement is output. The piezoelectric actuator is compact in structure, little in size and light in weight.

Description

technical field [0001] The invention relates to a piezoelectric actuator, in particular to a piezoelectric actuator outputting dynamic micro-angular displacement. Background technique [0002] Actuators based on piezoelectric materials have been widely used in microelectronics technology, bioengineering, aerospace engineering and other fields. It has the characteristics of compact structure and high control precision. However, most of the piezoelectric actuators currently used are actuators that can only output linear displacement. In the case where the output of micro-rotation angle is required, there are certain limitations in the simple use of linear actuators, which limits the use of piezoelectric pile actuators. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a piezoelectric actuator that outputs dynamic micro-angular displacements. The actuator has a compact structure, small volume...

AI Technical Summary

Problems solved by technology

However, most of the piezoelectric actuators currently used are actuators that can only output linear displacement.

In the case where the output of micro-rotation angle is required, the simple use of linear actuators has certain limitations, which limits the use of piezoelectric pile actuators

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