Homodromous eccentric constraint and oblique piezoelectric ceramic-based coupling mode type ultrasonic motor
An ultrasonic motor, piezoelectric ceramic technology, applied in piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc., can solve the problems of complex structure design, achieve compact motor structure, Simple design, the effect of large parallel rotary output
Active Publication Date: 2021-01-01
NANJING INST OF TECH
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[0005] The purpose of the present invention is to provide a coupled-mode ultrasonic motor based on co-directional eccentric constraints and slope piezoelectric ceramics to solve the problem in the prior art that the size of the stator unit needs to be adjusted to shorten the vibration modes required for the two types of work. Mode degeneracy can be achieved at a frequency of 1000, so that two operating modes can be simultaneously excited at the same frequency to form a composite mode, which leads to complex structural design problems
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[0032] A coupled-mode ultrasonic motor based on co-directional eccentric constraints and barotropic electroceramics, such as figure 1 and figure 2 , including a stator unit and a mover unit. The mover unit includes an upper mover 1 and a lower mover 2. The upper mover 1 and the lower mover 2 are respectively arranged on the upper and lower sides of the stator unit. The stator unit includes a metal elastic body 5, The right-end oblique piezoelectric ceramic 3, the left-end oblique piezoelectric ceramic 4, the upper driving foot 6 and the lower driving foot 7, the left and right ends of the metal elastic body 5 are respectively provided with the right-end oblique piezoelectric ceramic 3 and the left-end oblique piezoelectric ceramic 4, and the right end The positive cross-sections of the oblique piezoelectric ceramic 3 and the left end oblique piezoelectric ceramic 4 are parallelograms, and the upper and lower sides of the metal elastic body 5 are respectively provided with an ...
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The invention provides a homodromous eccentric constraint and oblique piezoelectric ceramic-based coupling mode type ultrasonic motor, which comprises a stator unit, an upper rotor and a lower rotor,and the upper rotor and the lower rotor are respectively arranged at the upper side and the lower side of the stator unit, and the stator unit comprises a metal elastomer, right-end oblique piezoelectric ceramic, left-end oblique piezoelectric ceramic, an upper driving foot and a lower driving foot; right-end oblique piezoelectric ceramic and left-end oblique piezoelectric ceramic are arranged atthe left end and the right end of the metal elastic body respectively, the normal sections of the right-end oblique piezoelectric ceramic and the left-end oblique piezoelectric ceramic are parallelograms, and an upper driving foot and a lower driving foot are arranged on the upper side and the lower side of the metal elastic body respectively; the upper driving foot and the lower driving foot arerespectively arranged at the maximum bending vibration amplitude of the metal elastomer; and the stator units are enabled to generate a coupling modal shape of first-order longitudinal vibration and second-order bending vibration by means of same-direction eccentric constraint, so that modal degeneration is not required, the structure is compact, and the design is relatively simple.
Description
technical field [0001] The invention relates to a coupling-mode ultrasonic motor based on the same-direction eccentric constraint and a slope piezoelectric ceramic. Background technique [0002] For linear ultrasonic motors, it can be divided into single-mode linear ultrasonic motors and multi-mode linear ultrasonic motors. For multi-mode linear ultrasonic motors, longitudinal-bend composite, longitudinal-torsion composite, and bend-bend composite are widely used at present, and the research has been relatively complete. [0003] However, the above-mentioned composite linear ultrasonic motor needs to adjust the size of the stator unit to shorten the frequency of the two required vibration modes to achieve mode degeneracy, so that two working modes can be simultaneously excited at the same frequency to form a composite mode. State, so the design is more complicated. [0004] The above-mentioned problems should be considered and solved in the design and production process of...
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IPC IPC(8): H02N2/00H02N2/02H02N2/04H02N2/10H02N2/12
CPCH02N2/003H02N2/02H02N2/04H02N2/10H02N2/12
Inventor 陆旦宏林秋香胡霞徐健乔
Owner NANJING INST OF TECH