Longitudinal-bending compound single-foot two-degree-of-freedom ultrasonic motor vibrator

A technology of ultrasonic motors and degrees of freedom, applied in the direction of generators/motors, piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, etc., can solve problems such as difficult planar two-degree-of-freedom drives, and achieve a series of and commercialization, ease of serialization and commercialization, and the effect of overcoming the serious problem of fever

Inactive Publication Date: 2017-11-17
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problem that it is difficult to realize plane two-degree-of-freedom driving in the existing longitudinal-bending composite ultrasonic motor vibrator. The present invention provides a longitudinal-bending composite single-legged two-degree-of-freedom ultrasonic motor vibrator

Method used

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  • Longitudinal-bending compound single-foot two-degree-of-freedom ultrasonic motor vibrator
  • Longitudinal-bending compound single-foot two-degree-of-freedom ultrasonic motor vibrator
  • Longitudinal-bending compound single-foot two-degree-of-freedom ultrasonic motor vibrator

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specific Embodiment approach 1

[0037] Specific implementation mode one: see Figure 1 to Figure 4 Describe this embodiment, the longitudinal bending composite single-legged two-degree-of-freedom ultrasonic motor vibrator described in this embodiment includes a middle beam 1, eight piezoelectric ceramic sheets 2 and two rear end covers 3, and is characterized in that the The middle beam 1 includes two horns 1-1 and a driving foot 1-2, and the two sides of the driving foot 1-2 are respectively fixedly connected with the end surfaces of the two horns 1-1; the rear end cover 3 A stud 3-1 is provided at the center of one side, and each stud 3-1 is fitted with four piezoelectric ceramic sheets 2, and the rear end cover 3 is screwed on the horn through the stud 3-1. 1-1, and realize the compression of the piezoelectric ceramic sheet 2;

[0038] The eight piezoelectric ceramic sheets 2 are all polarized along the thickness direction, and in the direction from one rear end cover 3 to the other rear end cover 3, the...

specific Embodiment approach 2

[0045] Specific Embodiment 2: The difference of the longitudinal-bending compound single-foot two-degree-of-freedom ultrasonic motor vibrator described in this embodiment is that all the ground electrode sheets 4 are connected to the common end of the excitation signal, and all the bending vibration electrode sheets 5 are connected to the first The phase driving signals are connected, and all the longitudinal bending multiplexing electrode sheets 6 are connected to the second phase driving signal, and the first phase driving signal and the second phase driving signal have a phase difference of 90 degrees in time.

[0046] In this embodiment, the first-phase drive signal and the second-phase drive signal have a phase difference of 90 degrees in time. Under various drive modes, the longitudinal bending compound single-leg two-degree-of-freedom ultrasonic motor vibrator will pass through the longitudinal vibration (see Figure 5 ) and bending vibration in the vertical direction (s...

specific Embodiment approach 3

[0047] Embodiment 3: The difference between this embodiment and the longitudinal bending compound single-leg two-degree-of-freedom ultrasonic motor vibrator described in Embodiment 1 is that all the ground electrode sheets 4 are connected to the common end of the excitation signal, and all the bending vibration electrodes Sheet 5 is connected to the first phase drive signal, the longitudinal bending multiple electrode sheet 6 on the left side between the third and fourth piezoelectric ceramic sheets 2 is connected to the second phase drive signal, the fifth and sixth piezoelectric ceramic sheets 2 are connected to the second phase drive signal, The longitudinal bending multiplexing electrode sheet 6 on the right side between the electric ceramic sheets 2 is connected to the second phase drive signal;

[0048] The longitudinal bending multiple electrode sheet 6 on the right side between the third and the fourth piezoelectric ceramic sheet 2 is connected to the third-phase drive ...

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Abstract

The invention discloses a longitudinal-flexural-combined single-foot two-degree-of-freedom ultrasonic motor vibrator, belonging to the technical field of piezoelectric ultrasonic motors, and solving the problem that an existing longitudinal-flexural-combined ultrasonic motor vibrator difficultly realizes planar two-degree-of-freedom drive. The longitudinal-flexural-combined single-foot two-degree-of-freedom ultrasonic motor vibrator comprises a middle beam, eight piezoelectric ceramic pieces and two rear end covers, wherein the eight piezoelectric ceramic pieces are all polarized along the thickness direction, in a direction from one rear end cover to the other rear end cover, the eight piezoelectric ceramic pieces are respectively a first piezoelectric ceramic piece to an eighth piezoelectric ceramic piece, the third, fourth, fifth and sixth piezoelectric ceramic pieces can be used for exciting the longitudinal vibration of the vibrator, and also can be used for exciting the flexural vibration of the vibrator in the horizontal direction, by controlling excitation signals applied to four longitudinal-flexural reuse electrode slices, switching between the two vibration modes can be conveniently realized, and thus drive output direction switching is realized. The longitudinal-flexural-combined single-foot two-degree-of-freedom ultrasonic motor vibrator is applied to the field of ultrasonic motor vibrator making.

Description

technical field [0001] The invention relates to a longitudinal bending composite single-leg two-degree-of-freedom ultrasonic motor vibrator, which belongs to the technical field of piezoelectric ultrasonic motors. Background technique [0002] Piezoelectric ultrasonic motor is a kind of piezoelectric ultrasonic motor that uses the inverse piezoelectric effect of piezoelectric ceramics to excite vibration in the ultrasonic frequency range in the elastic body, and forms a particle motion with a specific trajectory at a specific point or area on the surface of the elastic body, and then passes through the stator, The frictional coupling between the rotors converts the microscopic motion of the particle into the macroscopic motion of the rotor. It has the advantages of simple structure, flexible design, low speed, high torque / thrust, high power / torque density, high positioning accuracy, fast response speed, and self-locking when power is off. , No electromagnetic interference an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/00
CPCH02N2/0095
Inventor 刘英想闫纪朋刘军考陈维山冯培连
Owner HARBIN INST OF TECH
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