Differential clamping inchworm-type piezoelectric linear motor

Abstract

The invention discloses a differential clamping inchworm-type piezoelectric linear motor. The motor comprises four clamping discs, an actuating module, two guide mechanisms, two connecting rods and two connecting springs. The four clamping discs, the two connecting rods and the two connecting springs form two units. The four clamping discs are all provided with center holes, the two clamping discsof each unit sleeve the connecting rods through the center holes, the two clamping discs included by each unit are divided into a main clamping disc and an auxiliary clamping disc, the main clampingdiscs are fixedly connected with the actuating module, and the auxiliary clamping discs are connected with the main clamping discs through the connecting springs; the four clamping discs are equal inshape and comprise circular discs, and piezoelectric ceramics are eccentrically arranged on the circular discs of the four clamping discs; each guide mechanism comprises a C-shaped sleeve, a guide rail is convexly arranged on the inner wall of the sleeve, and guide grooves are concavely arranged on the peripheral walls of the four clamping discs; the two units are respectively arranged in the twosleeves, and pre-tightening elements are additionally arranged to press the sleeves on the four clamping discs so that the guide rails are matched with the guide grooves. The contact force of the motor is stable during the working process.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a differential clamp type inchworm piezoelectric linear motor. Background technique [0002] Nanotechnology is a high-tech that countries around the world focus on developing in the 21st century. Ultra-precision actuators with nanometer-level precision are the core power part of nanotechnology. Ultra-precision actuators have a wide range of applications, such as microelectronics manufacturing, precision machinery manufacturing, bioengineering, aerospace, etc. At the same time, these fields have put forward some strict requirements for ultra-precision motors, such as large output force, high resolution, faster response, immunity to electromagnetic interference, and low noise. [0003] The piezoelectric inchworm linear motor uses two sets of clamping devices and a telescopic drive device, adopts the bionic motion principle "clamp-drive-clamp", imitates the crawling mode of the inch...

AI Technical Summary

Problems solved by technology

For example, the publication number is CN102136811A, and the name is an application for the invention of a multi-legged clamping piezoelectric motor. It uses four clamping feet. The above design proposes an inchworm linear motor with a cylindrical guide mechanism, and the clamping feet are designed as discs. In this way, the guide rail is designed to be cylindrical, so that the contact between the clamp foot and the guide rail is cylindrical, which improves the output force, makes the movement more flexible, and the action is more stable, but there is a certain internal stress, which makes the motor The contact force may be unstable during operation

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