Cascaded amplified type adjustable-step piezoelectric actuator

A cascade amplification, actuator technology, applied in the direction of generator/motor, piezoelectric effect/electrostrictive or magnetostrictive motor, electrical components, etc., to achieve high-resolution effects

Active Publication Date: 2014-05-28
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, traditional piezoelectric actuators are difficult to have the above characteristics

Method used

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  • Cascaded amplified type adjustable-step piezoelectric actuator

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Embodiment Construction

[0012] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0013] As shown in the drawings, the embodiment of the present invention is a cascaded amplified adjustable step-length piezoelectric actuator, which includes an external displacement amplifying mechanism 1 and an internal displacement amplifying mechanism 2 of a rhombus frame structure, and the internal displacement amplifying mechanism 2 is inserted into the In the external displacement amplification mechanism 1, the external displacement amplification mechanism 1 is parallel to the horizontal plane, the short axis of the internal displacement amplification mechanism 2 is perpendicular to the horizontal plane, the short axis of the external displacement amplification mechanism 1 coincides with the long axis of the internal displacement amplification mechanism 2, and the first The two ends of the piezoelectric stack 3 are respectively...

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Abstract

A cascaded amplified type adjustable-step piezoelectric actuator comprises an external displacement amplification mechanism, an internal displacement amplification mechanism and a piezoelectric stack. The internal displacement amplification mechanism is sleeved in and fixed with the external displacement amplification mechanism, and the piezoelectric stack is arranged in the external displacement amplification mechanism or between the external displacement amplification mechanism and the internal displacement amplification mechanism; and the external displacement amplification mechanism and the internal displacement amplification mechanism are arranged vertical to each other. According to the cascaded amplified type adjustable-step piezoelectric actuator, the external displacement amplification mechanism is coupled with the internal displacement amplification mechanism, so that the piezoelectric stack produces displacement along the X direction after being electrified, the displacement is output in the Y direction after being amplified by the external displacement amplification mechanism, and the displacement of the Y direction is transmitted to the internal displacement amplification mechanism to be amplified to be output in the Z direction, thus, displacement can be output in the X,Y and Z directions, the displacement in the Z direction is amplified twice than that in the X direction, and accordingly, large displacement is output in the Z direction. The piezoelectric actuator is simple in structure, small in size and light in weight.

Description

technical field [0001] The invention relates to a piezoelectric actuator, in particular to a cascaded amplified piezoelectric actuator with adjustable step length. Background technique [0002] Actuators are widely used in all aspects of human life. In some fields (such as aerospace and medical fields), it is often required that the actuator can output both large and small steps, that is, it is required that the actuator not only has a larger Wide range of action, while the output displacement has a high resolution, and requires a simple structure, small size, and light weight. However, traditional piezoelectric actuators are difficult to have the above characteristics at the same time. Contents of the invention [0003] In order to solve the above-mentioned problems in the prior art, the object of the present invention is to provide a cascaded amplified piezoelectric actuator with adjustable step length, which can not only output displacement in a large range, but also h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/02H02N2/04
Inventor 敬子建徐明龙何少泽陈杰
Owner XI AN JIAOTONG UNIV
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