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Two-stroke compact type piezoelectric linear motor

A linear motor, compact technology, applied in the direction of piezoelectric effect/electrostrictive or magnetostrictive motor, generator/motor, electrical components, etc., can solve the problem of low energy density, large motor size, lack of problem, to achieve the effect of improved linear motion accuracy, improved electromechanical conversion efficiency, and high effective utilization rate

Inactive Publication Date: 2013-09-04
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of the motor are: 1) The motor has a large size and low energy density; 2) The motor lacks a fixed support point that can minimize energy loss

Method used

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  • Two-stroke compact type piezoelectric linear motor
  • Two-stroke compact type piezoelectric linear motor
  • Two-stroke compact type piezoelectric linear motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment one: see figure 1 , the two-stroke compact piezoelectric linear motor includes a stator and a mover, and the stator is composed of an upper elastic block 1, a lower elastic block 5, a first group of piezoelectric actuators 4, and a second group of piezoelectric actuators 6 and fastening screws 12; wherein the first group of piezoelectric actuators 4 is clamped between the upper elastic block 1 and the lower elastic block 5, and clamped evenly with the fastening screws 12, the second group of piezoelectric actuators 6 is firmly pasted on two opposite sides 11 of the lower elastic block 5; the mover is a linear guide rail 9, and its lower part is supported by two parallel guide wheels 10; the lower elastic block 5 of the stator has The tooth-shaped protrusion 8 is in conflict with the top surface of the linear guide rail 9, and the pre-pressure acts on the midpoint 3 below the upper elastic block 1, so that the mover and the stator are kept vertically compresse...

Embodiment 2

[0025] Embodiment 2: This embodiment is basically the same as Embodiment 1, and the special features are as follows: the lower elastic block 5 is made of a material with a smaller acoustic impedance, and the upper elastic block 1 is made of a material with a larger acoustic impedance Made, that is, the material acoustic impedance of the upper elastic block 1 is greater than the material acoustic impedance of the lower elastic block 5 . The stator has a completely symmetrical structure along the left-right direction and the front-rear direction, with four protrusions 2 on the upper part of the upper elastic block 1 and two protruding feet 7 on the lower part of the lower elastic block 5 . The material of the upper elastic block 1 is steel, and the material of the lower elastic block 5 is aluminum. Both the first group and the second group of piezoelectric actuators 4, 6 are piezoelectric ceramic sheets whose upper and lower surfaces are evenly coated with silver electrodes and ...

Embodiment 3

[0028] Embodiment 3: This embodiment is basically the same as Embodiment 2, and the special feature is that the overall dimensions of the motor stator are 20.2mm×15.6mm×12.0mm. The mover is a straight steel linear guide rail with a smooth working surface with a cross-sectional size of 12mm×6mm. Preload is applied at the node position of the motor stator vibration, so that the driving foot end surface of the aforementioned mover is in contact with the smooth working surface of the guide rail. and press tight.

[0029]The stator of the motor is a completely symmetrical structure along the left-right direction and the front-rear direction, and constitutes an integral composite elastic body. The longitudinal vibration modes of the two lower convex structures of the elastic body are mutually antiphase. The first working mode, the lateral deflection vibration mode of the two driving feet of the elastic body which are opposite to each other is the second working mode. Using finite e...

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PUM

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Abstract

The invention relates to a two-stroke compact type multi-mode compound piezoelectric linear motor, which comprises a stator and a rotor, wherein the stator comprises an upper elastic block, a lower elastic block, a first group of piezoelectric actuating parts, a second group of electric actuating parts and fastening screws, wherein the first group of piezoelectric actuating parts are clamped between the upper elastic block and the lower elastic block and are uniformly clamped by the fastening screws; and the second group of piezoelectric actuating parts are firmly stuck on two opposite lateral surfaces of the lower elastic block. The rotor of the motor is a linear guide rail; and the lower part of the motor is supported by two parallel guide wheels. The motor is in a compact shape approximate to a cub and has the characteristic of two-stroke power output as well as high energy density, stable and precise motion output, high electro-mechanical transformation efficiency and simple structure and is easy for miniaturization.

Description

technical field [0001] The invention relates to a non-electromagnetic principle linear motor and a linear actuator both for linear motion drive and control. In particular, a two-stroke compact piezoelectric linear motor with small size and high energy density. Background technique [0002] The ultrasonic motor is a new type of motor and power device that uses piezoelectric ceramics or other functional components to excite a certain predetermined mode of high-frequency resonance vibration of the elastomer, and outputs mechanical energy through friction. Compared with the traditional electromagnetic motor, one of its obvious advantages is that it can generate the output of linear motion mechanical energy with a very compact structure and a very small number of parts. Since the conversion and output of mechanical energy is achieved by friction, even after the power is cut off, the pre-pressure mechanism makes the stator tightly pressed on the mover, so that the motor obtains a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/02H02N2/04
Inventor 李朝东何晓菁张健滔赵伟王憬鲍晟
Owner SHANGHAI UNIV
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