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Spoke type rotor ultrasonic motor based on longitudinal vibration and working mode thereof

An ultrasonic motor and rotor technology, applied in piezoelectric/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc., can solve the problem of neglecting rotor design, and achieve easy miniaturization and amplification effects Strong, easy-to-assemble effect

Pending Publication Date: 2018-12-14
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the previous researchers have focused on the design of the stator, while ignoring the design of the rotor

Method used

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  • Spoke type rotor ultrasonic motor based on longitudinal vibration and working mode thereof
  • Spoke type rotor ultrasonic motor based on longitudinal vibration and working mode thereof
  • Spoke type rotor ultrasonic motor based on longitudinal vibration and working mode thereof

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Embodiment Construction

[0034] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0035] 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.

[0036] Such as figure 1 As shown, the present invention proposes a spoke-type rotor ultrasonic motor based on longitudinal vibration, which includes a stator, a first rotor, a second rotor, a rotating shaft, a spring, an adjustment ring and a limit ring.

[0037] The stator consists of a metal base and four piezoelectric ceramic sheets; as image 3 As shown, the metal base is a hollow cylinder with openings at both ends, a step is provided in the middle, and four planes are milled on...

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Abstract

The invention discloses a spoke type rotor ultrasonic motor based on longitudinal vibration and a working mode thereof, comprising a stator, a first rotor, a second rotor, a rotating shaft, a spring,an adjusting ring and a limiting ring. The stator comprises a metal matrix and four piezoelectric ceramic sheets; The first rotor and the second rotor each comprise a circular table, a disk and a plurality of metal spokes; Both ends of the metal matrix are self-centering cooperated with the conical surface of the first rotor and the second rotor, respectively, and pre-pressure is applied between the stator and the two rotors through a spring, an adjusting ring and a limiting ring. The invention converts the elongation motion of the stator when the stator is longitudinally vibrated into a firstrotor, the bending of the metal spokes in the second rotor causes the first rotor and the second rotor to generate torsion, when the stator is separated from the rotor, the rotor generates a slight rotation to the stator, the rotor rotates as a whole under the action of inertia, the use is flexible, and the control is simple.

Description

technical field [0001] The invention relates to the field of ultrasonic motors, in particular to a spoke-type rotor ultrasonic motor based on longitudinal vibration and its working method. Background technique [0002] Ultrasonic motor is a new type of actuator that uses the inverse piezoelectric effect of piezoelectric materials to realize the conversion of electrical energy to mechanical energy. The vibration mode drives the rotor through friction, which overcomes the problem of matching the resonant frequencies of multiple modes in the design of general ultrasonic motors, and has broad application prospects. [0003] The mode conversion type ultrasonic motor is a typical single mode ultrasonic motor, relying on the mode conversion mechanism to generate the vibration mode required to drive the rotor. This kind of vibration mode requires a special design of the mode conversion mechanism on the stator, so that the resonance frequency of the matrix is ​​close to the local re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/04
CPCH02N2/046
Inventor 李昕键金家楣陈迪王方一
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS