蠕动式压电/电致伸缩直线电机钳位机构设计  

A position gripped mechanism for piezoelectric/electrostrictive linear motor

作　　者：胡敏[1] 李勇[1] 周兆英[1] 才海男[1] 

机构地区：[1]清华大学精密仪器与机械学系

出　　处：《机械设计》1998年第8期15-17,共3页Journal of Machine Design

摘　　要：提出一种用于微进给压电／电致伸缩直线电机的弹性夹紧钳位机构。该机构采用柔性铰链和径向分布式杠杆构成力放大机构，实现对主轴的钳位与松位作用。本文在分析计算单槽半圆柔性铰链转角刚度、夹紧机构的力放大系数的基础上，讨论钳位机构与主轴之间的初始间隙、柔性铰链转角刚度以及杠杆机构的分布组数等因素对夹紧力的影响。该钳位机构可有效地降低钳位致动电压和机械配合精度，提高压电／电致伸缩直线电机的承载能力。This paper presents a position gripped mechanism for piezoelectric/electrostrictive linear motor used for microfeed. The position gripped mechanism for piezoelectric/electrostrictive linear motor has been designed to amplify the clamping force, which is comprised of three groups of levers distributed along circumference and connected one another by flexure hinges. The factors including primitive gap between position gripped mechanism and motor shaft, rigidity of flexure hinges and number of levers, which have influence on the clamping force, are discussed. This type of mechanism can increase the output force of the linear motor efficiently and reduce the applied voltage for gripping action.

关 键 词：压电 电致伸缩 直线电机 钳位机构 

分 类 号：TM359.4[电气工程—电机]