Stepped angle displacement piezoelectric actuator driven by herringbone structure and method thereof
A piezoelectric actuator, stepping technology, applied in piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, generators/motors, etc., can solve the difficult to achieve torque output, difficult to achieve large Problems such as stroke output and piezoelectric material actuation stroke are short, etc., to achieve the effect of large stroke output, simple structure and high stability
Inactive Publication Date: 2017-06-23
XI AN JIAOTONG UNIV
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[0002] Piezoelectric driving device is based on the inverse piezoelectric effect of piezoelectric materials. It is widely used in the fields of national defense, aerospace and machinery manufacturing. It has good linearity, high resolution, large driving force, and easy Excellent characteristics such as control, however, the actuation stroke of the piezoelectric material is short, it is difficult to achieve a large stroke output, especially the torque output of a large rotation angle is more difficult to achieve
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[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0020] Such as figure 1 , figure 2 with Figure 4 As shown, the driving scheme when the rotary actuator drives the output shaft 3 to output a counterclockwise angle is as follows: the first step is to energize the first locking piezoelectric ceramic 7-1 and the second locking piezoelectric ceramic 7-2, The long axis of the first rhombic ring 6-1 and the second rhombic ring 6-2 are extended, and the short axis is contracted, breaking away from the frictional contact with the base 2 and the upper baffle plate 1, thereby releasing the locked state of the actuator , so the first slider 505 and the second slider 506 of the herringbone drive mechanism 5 have the ability to slide on the base rail 2, and the herringbone drive mechanism 5 is in the initial state, such as Figure 4 (a); In the second step, the piezoelectric ceramic 4 is ene...
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The invention provides a stepped angle displacement piezoelectric actuator driven by a herringbone structure and a method thereof. The actuator comprises a circular-orbit pedestal, an upper baffle plate fixed with the pedestal by a support post, an output shaft, a herringbone drive mechanism, a piezoelectric ceramic unit installed at the upper side of the drive mechanism, one pair of rhomboic rings, and piezoelectric ceramic units in the rhomboic rings; the output shaft that is installed at the pedestal and is concentric with the pedestal can rotate freely; and the rhomboic rings are installed at the two ends of the lower part of the herringbone drive mechanism and are used for locking. After installation completion, when the piezoelectric ceramic units are not electrified, the two rhomboic rings, the upper baffle plate, and the pedestal are in close fit, thereby guaranteeing effective locking of the locking mechanism formed by the rhomboic rings and the piezoelectric ceramic units in an outage mode. In addition, the invention also provides a method for realizing stepped rotation by the actuator. The three piezoelectric ceramic units are driven successively according to a certain order, so that stepped rotation of the output shaft in a clockwise direction and an anti-clockwise direction. The structure is novel; the actuation is realized precisely; and the outage self-locking is realized.
Description
technical field [0001] The invention belongs to a piezoelectric ceramic driving device, in particular to a stepping angular displacement piezoelectric actuator driven by a herringbone structure and a method thereof. Background technique [0002] Piezoelectric driving device is based on the inverse piezoelectric effect of piezoelectric materials. It is widely used in the fields of national defense, aerospace and machinery manufacturing. It has good linearity, high resolution, large driving force, and easy However, the actuation stroke of the piezoelectric material is short and it is difficult to achieve a large stroke output, especially the torque output of a large rotation angle is even more difficult to achieve. Therefore, a stepping angular displacement actuator with high precision and large driving stroke is needed. Contents of the invention [0003] In order to solve the problems existing in the above-mentioned prior art, the object of the present invention is to prov...
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IPC IPC(8): H02N2/04
CPCH02N2/04H02N2/046
Inventor 雷俊琪徐明龙宋思扬邵妍
Owner XI AN JIAOTONG UNIV