High-torque and large-stroke rotary actuator and method driven by piezoelectric stack and motor hybrid

Abstract

A large-torque and large-stroke rotary actuator driven by a piezoelectric stack and a motor and a method thereof. The actuation includes actuating the piezoelectric stack, a diamond-shaped ring installed outside the piezoelectric stack, and a threaded connecting rod connected to one end of the diamond-shaped ring. The lock nut is connected to the screw thread and the threaded connecting rod. At the same time, the lock nut is used as the rotor of the rotating mechanism, and the drive stator is nested outside; the connecting rod with a large lead screw thread is connected to the other end of the diamond ring, and the thread and the connecting rod are connected to each other. The connected lock nut, the lock nut is used as the rotor, the drive stator is nested on the outside, the lead screw nut connected with the threaded connecting rod at the other end through a large lead thread, and the thrust ball bearings installed on both sides of the lead screw nut, The above-mentioned structure is encapsulated in the casing; the present invention also provides an actuation method, which drives the piezoelectric stack and the motor in a certain order, and can realize the step output of large torque and large stroke rotary motion; the actuator involved in the present invention has a rotary drive Large stroke, high torque output in two directions, power-off locking, reliable and stable locking.

Description

technical field [0001] The invention relates to a rotary actuator and a method, in particular to a rotary actuator with large torque and large stroke driven by a piezoelectric stack and a motor and a method. Background technique [0002] With the continuous development of science and technology, higher requirements are put forward for the driving device in important industrial fields such as national defense, aerospace, and machinery manufacturing. Due to the limitations of its working principle and structural form, the traditional electromagnetic motor has been unable to meet the new requirements. requirements. In recent years, piezoelectric stack driving devices have effectively filled this gap. However, due to the shortcoming of the small actuating stroke of the piezoelectric material, it is difficult to realize the output of a large stroke, especially for the output of the rotary motion with a large rotation angle. Moreover, the stepping actuator designed solely with p...

AI Technical Summary

Problems solved by technology

However, due to the shortcoming of the small actuating stroke of the piezoelectric material, it is difficult to achieve the output of a large stroke, especially for the output of the rotary motion with a large rotation angle.

Moreover, the stepping actuator designed solely with piezoelectric materials is also difficult to guarantee the output locking ability of the actuator, and cannot meet the higher requirements for the actuator. There is an urgent need for a stepping actuator with a large driving stroke, a large output torque, and a resolution Stepping rotary actuator with high efficiency and reliable self-locking ability

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