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piezoelectric actuator

A piezoelectric actuator and piezoelectric ceramic technology, applied in the direction of generator/motor, piezoelectric effect/electrostrictive or magnetostrictive motor, electrical components, etc., can solve the problem of uncompact structure, small output displacement, Problems such as low displacement magnification, to achieve the effect of compact structure, high displacement magnification ability, and good displacement magnification effect

Active Publication Date: 2020-11-24
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a piezoelectric actuator with displacement amplification effect to solve the problems of small relative output displacement, low displacement amplification factor or uncompact structure of piezoelectric actuators in the prior art

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Embodiment Construction

[0047] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention.

[0048] For details, please refer to Figure 1 to Figure 5 as shown, figure 1 is a schematic diagram of the overall appearance of the piezoelectric actuator; figure 2 yes figure 1 Exploded diagram of medium piezoelectric actuator; image 3 yes figure 1 Front view of the overall structure of the medium piezoelectric actuator; Figure 4 yes figure 1 Front view of the first-stage elastically deformable plate in the medium piezoelectric actuator; Figure 5 yes figure 1 Front view of the second-stage elastically deformable plate in a medium piezoelectric actuator.

[0049] Such as ...

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Abstract

The invention relates to a piezoelectric actuator, comprising: a first-stage elastically deformable plate, two second-stage elastically deformable plates, two external connection end caps and piezoelectric ceramics, the first-stage elastically deformable plate has a middle gap, the first inner end face and the second inner end face of the middle gap are respectively fixedly connected with the third end face and the fourth end face of the piezoelectric ceramic stretching direction; the two second-stage elastically deformable plates are arranged symmetrically on the The two sides of the first-stage elastically deformable plate are respectively connected in series with the first-stage elastically deformable plate, and the two second-stage elastically deformable plates are connected in parallel; the two external connection end caps are located on the piezoelectric On both sides of the ceramic expansion and contraction direction, the external connection end cap is fixedly connected with the second-stage elastic deformation plate. The piezoelectric actuator of the present invention has compact structure and good displacement amplification effect, and is suitable for occasions requiring precise linear displacement drive.

Description

technical field [0001] The present invention relates to the technical field of displacement control. Specifically, the present invention relates to a piezoelectric actuator, especially a piezoelectric actuator with displacement amplification. Background technique [0002] Piezoelectric ceramics have an inverse piezoelectric effect, which can convert electrical energy into mechanical energy under the action of an electric field, thereby changing its own length to generate displacement and driving force. The expansion and contraction of piezoelectric ceramics has a good linear proportional relationship with its input voltage, and the repeatability is high, so it can be used in facilities or equipment that require precise adjustment of the relative position relationship. [0003] However, when the piezoelectric ceramics are used alone, relative to the initial length of the piezoelectric ceramics in the expansion and contraction direction, the relative displacement generated by ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/02
CPCH02N2/028
Inventor 赵浩江薛闯董吉洪
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI