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Piezo drives, motors, robots, and pumps

A piezoelectric driving and driven body technology, applied in the direction of generator/motor, piezoelectric effect/electrostrictive or magnetostrictive motor, pump device, etc., can solve the deformation of the spring constant contact part in the unmentioned spring area issues such as quantity

Active Publication Date: 2020-12-04
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, Patent Documents 1 to 3 only describe the qualitative matter of the existence of the spring region, and do not mention the specific spring constant of the spring region, the amount of deformation of the contact portion due to pressing, etc.

Method used

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  • Piezo drives, motors, robots, and pumps
  • Piezo drives, motors, robots, and pumps
  • Piezo drives, motors, robots, and pumps

Examples

Experimental program
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Effect test

no. 1 approach

[0053] 1. Piezoelectric drive device

[0054] First, a piezoelectric drive device according to this embodiment will be described with reference to the drawings.

[0055] figure 1 It is a top view schematically showing the piezoelectric drive device 100 according to this embodiment. figure 2 is schematically showing the piezoelectric drive device 100 according to the present embodiment. figure 1 II-II line sectional view. image 3 as well as Figure 4 It is a plan view schematically showing the vicinity of the contact portion 20 of the piezoelectric drive device 100 according to the present embodiment. Figure 5 It is a perspective view schematically showing the vicinity of the contact portion 20 of the piezoelectric drive device 100 according to the present embodiment.

[0056] Such as Figure 1 to Figure 5 As shown, the piezoelectric driving device 100 includes a substrate 10 , a contact portion 20 , and a piezoelectric element 30 .

[0057] The substrate 10 is compos...

experiment example

[0099] Experimental examples are shown below and the present invention will be described more specifically. In addition, the present invention is not limited in any way by the following experimental examples.

[0100] 3.1. Calculation of formula (1)

[0101] Such as Figure 4 As shown, if the force (pressing force) F 0 Assuming that the amount of deformation of the contact portion when the rotor is pressed against the contact portion is δx, the spring constant K in the longitudinal direction of the contact portion is the following formula (4), and the formula (4) can be expanded to obtain the following Formula (5).

[0102] K=F 0 / δx···(4)

[0103] δx=F 0 / K···(5)

[0104] On the other hand, the deformation is related to the full amplitude of the vibrating body X 0 Spring constant K in the longitudinal direction of the contact part in the case of the same amount (length) 0 is the following formula (6), and the following formula (7) can be obtained by expanding the for...

no. 2 approach

[0139] 5. Piezoelectric drive device

[0140] Figure 9 It is a perspective view schematically showing the vicinity of the contact portion 20 of the piezoelectric drive device 300 according to the present embodiment.

[0141] The piezoelectric drive device 300 of the present embodiment differs from the first embodiment in that the protruding portion 12b protruding toward the front end portion 22 of the contact portion 20 is formed at the end portion 12a of the vibrating body portion 12 . Hereinafter, the same reference numerals are assigned to the same components as those in the first embodiment, and their descriptions will be omitted or simplified here.

[0142] Such as Figure 9 As shown, the piezoelectric driving device 300 of the present embodiment includes the substrate 10 , the contact portion 20 , and the piezoelectric element 30 in the same manner as the first embodiment.

[0143] The contact portion 20 is provided at the end portion 12 a of the vibrating body porti...

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Abstract

The present invention provides a piezoelectric drive device, a motor, a robot, and a pump capable of stabilizing output characteristics by determining the amount of deformation of a contact portion due to pressing. The piezoelectric driving device includes: a substrate having a fixed part and a vibrating body part (12) provided with a piezoelectric element and supported by the fixed part; and a contact part (20) which is in contact with a driven body (4) and vibrates The movement of the body part is transmitted to the driven body (4), the contact part is arranged on the end part (12a) in the longitudinal direction of the vibrating body part, and the end part (12a) when the contact part (20) is not pressed by the driven body The distance (L X0 ), and the distance (L X1 ) difference (δx) is less than the full amplitude of the longitudinal direction (X 0 ).

Description

technical field [0001] The invention relates to piezoelectric drives, motors, robots, and pumps. Background technique [0002] A piezoelectric actuator (piezoelectric drive device) that drives a driven body by vibrating a vibrating body with a piezoelectric element does not require magnets or coils, and is therefore used in various fields. [0003] It is described that in such a piezoelectric drive device, for the purpose of preventing excessive vibration, preventing point contact between the ultrasonic vibrator and the driven body member, and improving power efficiency, etc., the contact portion of the piezoelectric drive device with the driven body A spring region is provided nearby (for example, refer to Patent Documents 1 to 3). [0004] Patent Document 1: Japanese Patent Laid-Open No. 2008-295234 [0005] Patent Document 2: Japanese Patent Application Laid-Open No. 6-22565 [0006] Patent Document 3: Japanese Patent Laid-Open No. 2015-80329 [0007] However, Patent ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/00H02N2/02
CPCH02N2/0015H02N2/0065H02N2/026B25J9/12H02N2/004H02N2/103F04B43/08F04B23/02F04B43/082F04B43/095F04B43/046F04B43/14H02N2/0075H02N2/108F04B17/003H02N2/001
Inventor 高桥智明荒川丰
Owner SEIKO EPSON CORP
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