Actuator for large displacement of signal piezoelectric stack
A large displacement, single piezoelectric technology, applied in the direction of generator/motor, piezoelectric effect/electrostrictive or magnetostrictive motor, electrical components, etc., can solve the problem of limited output displacement of single piezoelectric stack
Active Publication Date: 2014-05-28
XI AN JIAOTONG UNIV
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Problems solved by technology
Due to the limited output displacement of the unimorph stack, traditional unimorph actuators can only output small displacements.
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[0011] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0012] As shown in the drawings, the embodiment of the present invention is a unimorph large displacement actuator, which includes an external displacement amplification mechanism 1 and an internal displacement amplification mechanism 2 of a rhombus frame structure, and the internal displacement amplification mechanism 2 is inserted into the external displacement amplification mechanism. In 1, the short axis of the external displacement amplification mechanism 1 is perpendicular to the horizontal plane, and the internal displacement amplification mechanism 2 is parallel to the horizontal plane. The connector 3 and the second rigid connector 4 are fixed, and the long axis of the internal displacement amplifying mechanism 2 is perpendicular to the long axis of the external displacement amplifying mechanism 1, and the two ends of the piez...
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An actuator for large displacement of a signal piezoelectric stack comprises an outside displacement amplifying mechanism, an inside displacement amplifying mechanism and the piezoelectric stack, wherein the inside displacement amplifying mechanism is sleeved in and fixed with the outside displacement amplifying mechanism, the piezoelectric stack is arranged in the inside displacement amplifying mechanism, and the outside displacement amplifying mechanism is perpendicular to the inside displacement amplifying mechanism. The outside displacement amplifying mechanism and the inside displacement amplifying mechanism are coupled, so that the end of the piezoelectric stack performs displacement along an x direction after the power is on; the displacement is amplified by the inside displacement amplifying mechanism and then output in a Y direction; and the displacement in the Y direction can be transmitted onto the outside displacement amplifying mechanism to be amplified and output in a Z direction. The displacement can be output in the X direction, the Y direction and the Z direction, the displacement in the Z direction is amplified by twice compared with the displacement in the X direction, and accordingly large displacement is output in the Z direction. Besides, the actuator for the large displacement of the signal piezoelectric stack is simple in structure, small in size and light.
Description
technical field [0001] The invention relates to a piezoelectric actuator, in particular to a single piezoelectric stack large displacement actuator. Background technique [0002] As an important part of the active control system, the actuator is widely used in industrial production and daily life. With the development of active control technology, the requirements for actuators are getting higher and higher. Due to the limited output displacement of the unimorph stack, the traditional unimorph actuator can only output a small displacement. 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 unimorph large-displacement actuator, which has the characteristics of simple structure, small volume and light weight. [0004] In order to achieve the above object, the technical scheme adopted in the present invention is: [0005] A single piezoelectric stack large displacement actu...
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IPC IPC(8): H02N2/02
Inventor 敬子建徐明龙陈杰何少泽
Owner XI AN JIAOTONG UNIV