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Two-degree-of-freedom piezoelectric driver for bending piezoelectric vibrator and excitation method for two-degree-of-freedom motion realized by using the driver

A piezoelectric driver and piezoelectric vibrator technology, which can be applied to piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc., and can solve the problems of high cost, small stroke, and complex structure. , to achieve the effect of low cost, large driving stroke and wide application range

Active Publication Date: 2018-11-02
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention aims to solve the problems of the existing two-degree-of-freedom piezoelectric drive device with complex structure, high cost and small stroke

Method used

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  • Two-degree-of-freedom piezoelectric driver for bending piezoelectric vibrator and excitation method for two-degree-of-freedom motion realized by using the driver
  • Two-degree-of-freedom piezoelectric driver for bending piezoelectric vibrator and excitation method for two-degree-of-freedom motion realized by using the driver
  • Two-degree-of-freedom piezoelectric driver for bending piezoelectric vibrator and excitation method for two-degree-of-freedom motion realized by using the driver

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specific Embodiment approach 1

[0046] Specific embodiment one: see Figure 1 to Figure 5 To explain this embodiment, the two-degree-of-freedom piezoelectric actuator of the bending piezoelectric vibrator described in this embodiment includes a base 1, a piezoelectric vibrator 2 and a mover 3;

[0047] The piezoelectric vibrator 2 includes a bent piezoelectric ceramic group 2-1, an horn 2-2, and a driving foot 2-3. The bent piezoelectric ceramic group 2-1 is disposed between the base 1 and the horn 2-2. Meanwhile, the thin end of the horn 2-2 is provided with a driving foot 2-3, and the driving foot 2-3 is in contact with the mover 3;

[0048] The bending piezoelectric ceramic group 2-1 is divided into two parts, namely the first bending piezoelectric ceramic group 2-1-1 and the second bending piezoelectric ceramic group 2-1-2.

[0049] In this embodiment, the two-degree-of-freedom piezoelectric actuator adopting the bending piezoelectric vibrator of the present invention has low cost and large driving stroke. In ...

specific Embodiment approach 2

[0050] Specific implementation manner two: see Figure 1 to Figure 5 To explain this embodiment, the difference between this embodiment and the two-degree-of-freedom piezoelectric actuator of the bending piezoelectric vibrator described in the first embodiment is that the mover 3 is a cylindrical mover, a spherical mover or a flat type. Mover.

specific Embodiment approach 3

[0051] Specific implementation manner three: see Figure 1 to Figure 5 To illustrate this embodiment, the difference between this embodiment and the two-degree-of-freedom piezoelectric actuator of the bending piezoelectric vibrator described in the first embodiment is that the first group of bending piezoelectric ceramic group 2-1-1 and the second A energized electrode sheet 2-4 is provided between two adjacent piezoelectric ceramic sheets in the group bending piezoelectric ceramic group 2-1-2.

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Abstract

The invention discloses a 2-degree of freedom piezoelectric driver of a bent piezoelectric vibrator and a motivation method of realizing 2-degree of freedom movement by using the driver, and belongs to the technical field of the piezoelectric driving. The problem that the existing 2-degree of freedom piezoelectric driving device is complicated in structure, high in cost and small in travel is solved. The driver comprises a base, a piezoelectric vibrator and a mover; the bent piezoelectric ceramic is divided into two parts: the first set of bent piezoelectric ceramic group and the second set of bent piezoelectric group; when two sets of piezoelectric ceramic exert a voltage motivation signal, the piezoelectric vibrator can realize the bending movement of 2-degree of freedom. By changing the voltage motivation signal, the bending direction of the piezoelectric vibrator can be controlled; the friction force is used as the driving force and the piezoelectric vibrator is used as the stator so as to drive the mover to realize the 2-degree of freedom movement. The 2-degree of freedom piezoelectric driver is mainly applied to the super-precise driving, positioning, processing and like field.

Description

Technical field [0001] The invention belongs to the technical field of piezoelectric driving. Background technique [0002] In recent years, piezoelectric drive technology has been widely used in ultra-precision machining, positioning and other fields as a new drive technology, and has been greatly developed. Piezoelectric drive technology is a drive technology that uses the inverse piezoelectric effect of piezoelectric materials to convert electrical energy into mechanical energy. Piezoelectric actuators have the advantages of simple structure, high precision, high power density, large output force, no electromagnetic interference, and easy realization of miniaturization. They are widely used in ultra-precision fields such as aerospace, robotics, and nano-manufacturing. The two-degree-of-freedom piezoelectric actuator can realize multiple driving functions with a single actuator, which can effectively reduce the size of the actuator and has attracted more and more attention. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/00
CPCH02N2/0075
Inventor 刘英想邓杰陈维山刘军考王良冯培连
Owner HARBIN INST OF TECH
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