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 large motor size, low energy density, lack of problem, to achieve the effect of improving electromechanical conversion efficiency, improving linear motion accuracy, and high effective utilization rate

Inactive Publication Date: 2011-05-25
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 ene

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

Example Embodiment

[0024] Example 1: see figure 1 , the two-stroke compact piezoelectric linear motor includes a stator and a mover, 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 the 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 evenly clamped with the fastening screws 12, the second group of piezoelectric actuators 6 is firmly pasted on the two opposite sides 11 of the lower elastic block 5; the mover is a linear guide 9, and its lower part is supported by two guide wheels 10 arranged in parallel; 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 com...

Example Embodiment

[0025] Embodiment 2: This embodiment is basically the same as Embodiment 1, with the following special features: the lower elastic block 5 is made of a material with a lower acoustic impedance, and the upper elastic block 1 is made of a material with a larger acoustic impedance That is, the material acoustic impedance rate of the upper elastic block 1 is greater than the material acoustic impedance rate of the lower elastic block 5 . The stator has a completely symmetrical structure in the left-right direction and the front-rear direction, respectively. The upper part of the upper elastic block 1 is provided with four protruding blocks 2 , and the lower part of the lower elastic block 5 is provided with two protruding feet 7 . The material of the upper elastic block 1 is steel, and the material of the lower elastic block 5 is aluminum. The first group and the second group of piezoelectric actuators 4 and 6 are piezoelectric ceramic sheets whose upper and lower sides are unifor...

Example Embodiment

[0028] Embodiment 3: This embodiment is basically the same as Embodiment 2, and the special point is that the overall size of the motor stator is 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. Pre-pressure is applied at the node position of the vibration of the motor stator, so that the end face of the drive foot of the mover is in contact with the smooth working surface of the guide rail. and compress.

[0029] The stator of the motor is a completely symmetrical structure in the left-right direction and the front-rear direction, and constitutes an integral composite elastic body. The longitudinal vibration modes of the two lower protruding structures of the elastic body that are opposite to each other are the first vibration mode. In a working mode, the lateral yaw vibration mode of the two driving legs of the elastic body which are opposite to each other is used as the second workin...

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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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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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