Clamping Quadruped Longitudinal Bending Composite Ultrasonic Motor Vibrator

Abstract

The invention relates to a clamping quadruped longitudinal bending composite ultrasonic motor vibrator, which belongs to the technical field of piezoelectric ultrasonic motors. The invention aims to solve the problems of low tensile strength of the ceramic material and limited mechanical output capacity caused by the strength and fatigue life of the adhesive layer in the existing chip-type composite ultrasonic motor vibrator. The clip-type quadruped longitudinal bending composite ultrasonic motor vibrator of the present invention adopts a sandwich structure to ensure that the piezoelectric ceramic sheet is always in a state of pressure, and in this state, a high-strength voltage is used for excitation to improve the mechanical output capability; at the same time, the The invention adopts three pieces of piezoelectric ceramic sheets polarized along the thickness direction to realize the excitation of the longitudinal-bending composite vibration of the vibrator, and the shape of the hard plate and the ceramic sheet used in the present invention is regular, which realizes the great simplification of the processing and assembly process of the ultrasonic motor vibrator . The clamping quadruped longitudinal bending composite ultrasonic motor vibrator described in the present invention is suitable for the field of ultrasonic motor production.

Description

technical field

[0001] The invention 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 low speed and high torque, no need for a transmission mechanism, no electromagnetic interference, fast response, and self-locking when power is off. As a piezoelectric driver, it has Very wide range of applications.

[0003] Due to the simplicity of the excitation principle and the simplicity of the theoretical analysis ...

Examples

specific Embodiment approach 1

[0028] Specific implementation mode one: refer to figure 1 and image 3 Specifically explaining this embodiment, the clip-type quadruped longitudinal bending composite ultrasonic motor vibrator described in this embodiment includes: three piezoelectric ceramic sheets 1, two hard plates 2 and four electrode sheets 3;

[0029] The three piezoelectric ceramic sheets 1 are all arranged in parallel with the two hard plates 2, and are all located between the two hard plates 2;

[0030] An electrode sheet is respectively fixed between two adjacent piezoelectric ceramic sheets and between the piezoelectric ceramic sheet and the hard plate;

[0031] The three piezoelectric ceramic sheets 1 are all polarized along the thickness direction, and the polarization directions of two adjacent piezoelectric ceramic sheets are opposite.

[0032] In the actual application of the clip-type quadruped longitudinal bending composite ultrasonic motor vibrator described in this embodiment, the two el...

specific Embodiment approach 2

[0033] Specific implementation mode two: refer to figure 2 and image 3 Specifically explaining this embodiment, the clip-type quadruped longitudinal bending composite ultrasonic motor vibrator described in this embodiment includes: three piezoelectric ceramic sheets 1, two hard plates 2 and six electrode sheets 3;

[0034] The three piezoelectric ceramic sheets 1 are all arranged in parallel with the two hard plates 2, and are all located between the two hard plates 2;

[0035] Two electrode sheets are fixed between two adjacent piezoelectric ceramic sheets, and one electrode sheet is fixed between the piezoelectric ceramic sheet and the hard plate;

[0036] The three piezoelectric ceramic sheets 1 are all polarized along the thickness direction, and the polarization directions of two adjacent piezoelectric ceramic sheets are opposite.

[0037] In the actual application of the clip-type four-legged longitudinal bending composite ultrasonic motor vibrator described in this ...

specific Embodiment approach 3

[0040] Specific embodiment 3: This embodiment is to further explain the clip-type four-legged longitudinal bending composite ultrasonic motor vibrator described in specific embodiment 1 or 2. In this embodiment, the lengths of the two hard plates 2 are greater than The length of the piezoelectric ceramic sheet, and the four end faces of the two hard plates 2 are the driving feet of the clamping quadruped longitudinal bending composite ultrasonic motor vibrator.

technical field

[0001] The invention 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 low speed and high torque, no need for a transmission mechanism, no electromagnetic interference, fast response, and self-locking when power is off. As a piezoelectric driver, it has Very wide range of applications.

[0003] Due to the simplicity of the excitation principle and the simplicity of the theoretical analysis ...

Examples

specific Embodiment approach 1

[0028] Specific implementation mode one: refer to figure 1 and image 3 Specifically explaining this embodiment, the clip-type quadruped longitudinal bending composite ultrasonic motor vibrator described in this embodiment includes: three piezoelectric ceramic sheets 1, two hard plates 2 and four electrode sheets 3;

[0029] The three piezoelectric ceramic sheets 1 are all arranged in parallel with the two hard plates 2, and are all located between the two hard plates 2;

[0030] An electrode sheet is respectively fixed between two adjacent piezoelectric ceramic sheets and between the piezoelectric ceramic sheet and the hard plate;

[0031] The three piezoelectric ceramic sheets 1 are all polarized along the thickness direction, and the polarization directions of two adjacent piezoelectric ceramic sheets are opposite.

[0032] In the actual application of the clip-type quadruped longitudinal bending composite ultrasonic motor vibrator described in this embodiment, the two el...

specific Embodiment approach 2

[0033] Specific implementation mode two: refer to figure 2 and image 3 Specifically explaining this embodiment, the clip-type quadruped longitudinal bending composite ultrasonic motor vibrator described in this embodiment includes: three piezoelectric ceramic sheets 1, two hard plates 2 and six electrode sheets 3;

[0034] The three piezoelectric ceramic sheets 1 are all arranged in parallel with the two hard plates 2, and are all located between the two hard plates 2;

[0035] Two electrode sheets are fixed between two adjacent piezoelectric ceramic sheets, and one electrode sheet is fixed between the piezoelectric ceramic sheet and the hard plate;

[0036] The three piezoelectric ceramic sheets 1 are all polarized along the thickness direction, and the polarization directions of two adjacent piezoelectric ceramic sheets are opposite.

[0037] In the actual application of the clip-type four-legged longitudinal bending composite ultrasonic motor vibrator described in this ...

specific Embodiment approach 3

[0040] Specific embodiment 3: This embodiment is to further explain the clip-type four-legged longitudinal bending composite ultrasonic motor vibrator described in specific embodiment 1 or 2. In this embodiment, the lengths of the two hard plates 2 are greater than The length of the piezoelectric ceramic sheet, and the four end faces of the two hard plates 2 are the driving feet of the clamping quadruped longitudinal bending composite ultrasonic motor vibrator.

Images