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High-thrust large-stroke piezoelectric inchworm actuator and driving method thereof

A large-stroke, large-thrust technology, applied in the field of large-thrust and large-stroke piezoelectric inchworm actuators and their drives, can solve the problems of complex coupling matching control, non-resistance to electromagnetic interference, long-size envelope, etc., and reduce manufacturing costs. , strong electromagnetic compatibility, fast response effect

Active Publication Date: 2021-02-12
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a large thrust and large stroke in order to solve the existing problems of the inchworm piezoelectric actuator such as complex coupling and matching control, long size envelope, electromagnetic and not resistant to electromagnetic interference, etc. Piezoelectric inchworm actuator and driving method thereof

Method used

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  • High-thrust large-stroke piezoelectric inchworm actuator and driving method thereof
  • High-thrust large-stroke piezoelectric inchworm actuator and driving method thereof
  • High-thrust large-stroke piezoelectric inchworm actuator and driving method thereof

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Embodiment Construction

[0044] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0045] This invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, components are exaggerated for clarity.

[0046] Such as figure 1 As shown, a large-thrust large-stroke piezoelectric inchworm actuator includes a first motor actuating unit, a second motor actuating unit, a fixed cylinder, first to second support rings, first to second fixed rings, A piezoelectric actuator unit, a first anti-rotation unit, a second anti-rotation unit and a lead screw.

[0047] The fixed cylinder is a hollow cylinder with openings at both ends, and the first supporting ring, the first fixing ring, the second...

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Abstract

The invention discloses a large-thrust large-stroke piezoelectric inchworm actuator and a driving method thereof. The actuator comprises a fixed cylinder, two supporting rings, two fixed rings, a piezoelectric actuating unit, two motor actuating units, two anti-rotation units and a lead screw. Each piezoelectric actuating unit comprises a piezoelectric stack, two caps and two cylindrical tension springs; each motor actuating unit comprises a sleeve, a hollow motor, a flexible coupling and a clamping nut, and the anti-rotation unit comprises an end cover and a ball spline cylinder. During work,the two hollow motors are used for alternately rotating the two clamping nuts to the supporting surface for clamping, the lead screw is pushed to output in a small displacement mode in cooperation with stretching and retracting of the piezoelectric actuating unit, and bidirectional large-thrust large-stroke actuation is finally achieved in cycles. According to the invention, electromagnetism is not generated, electromagnetic interference is avoided, the complex coupling phenomenon existing when the piezoelectric actuator unit is matched with the piezoelectric actuator unit for work is eliminated, and drive control is facilitated.

Description

technical field [0001] The invention relates to the field of piezoelectric actuators, in particular to a piezoelectric inchworm actuator with large thrust and large stroke and a driving method thereof. Background technique [0002] For decades, piezoelectric actuators have been used in aerospace, micro-robots, biomedicine, precision machining and optical engineering due to their advantages such as high precision, fast response, large output force, strong electromagnetic compatibility, self-locking when power is off, and flexible design. Get widely used. Piezoelectric actuator is a kind of moving part that adopts a certain principle or structure to accumulate or amplify the small strain generated by piezoelectric material, and then realize large stroke output. According to the vibration state it uses, it can be divided into resonance type and non-resonance type. Among them, the resonant type has a high operating frequency, and the typical representative is an ultrasonic mot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/02H02N2/04H02N2/06
CPCH02N2/023H02N2/04H02N2/06
Inventor 时运来孙海超林瑜阳孙翰吴文博
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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