High-precision and high-torque piezoelectric rotary actuation device and method including h-shaped structure

A rotary actuation, high torque technology, applied in piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc. It is difficult for the actuator to realize the problems of large stroke output and small actuating stroke, so as to improve the locking reliability, low power consumption, and amplify the actuating displacement.

Active Publication Date: 2017-08-25
西安朗威科技有限公司
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Problems solved by technology

[0002] In recent years, the continuous development of piezoelectric actuators has supported the development and construction of important industries such as national defense, aerospace, and machinery manufacturing, and has also derived a wide variety of piezoelectric actuators. However, due to the shortcoming of piezoelectric materials with small actuating strokes, Piezoelectric ceramic actuators are difficult to achieve large stroke output, especially torque output with large rotation angle is even more difficult to achieve

Method used

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  • High-precision and high-torque piezoelectric rotary actuation device and method including h-shaped structure
  • High-precision and high-torque piezoelectric rotary actuation device and method including h-shaped structure

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Embodiment Construction

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] like figure 1 and figure 2 As shown in the figure, a high-precision high-torque piezoelectric rotary actuating device with an H-shaped structure of the present invention includes a base 1, an output shaft 2 mounted on the base 1 and capable of free rotation, and connected to the output shaft 2 through flexible hinges respectively. The first actuating arm 3-1 and the second actuating arm 3-2 are connected to the first diamond ring 4-1 at one end of the first actuating arm 3-1, and are connected to the second actuating arm 3-2 and The second rhombus ring 4-2 at the corresponding end of the first actuating arm 3-1, the first piezoelectric ceramics 5-1 and the second piezoelectric ceramics 5-1 and the second rhombus are respectively installed inside the first rhombus 4-1 and the second rhombus ring 4-2 Piezoelectric ceramics 5-2, ...

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Abstract

The invention discloses a high-precision large-torque piezoelectric rotary actuation apparatus with an H-type structure and a method. An actuator comprises an actuator base, an output shaft mounted on the base and capable of rotating freely, two actuator arms connected with the output shaft through a flexible hinge respectively, rhombic rings connected to the end parts of the actuator arms, piezoelectric ceramics mounted in the rhombic rings, a piezoelectric ceramic 6 connected between the actuator arms, and an upper top cover connected with the base through a support column. The distance between the base and the top cover after the installation is smaller than the transverse length of the rhombic rings, so that the piezoelectric ceramics can be ensured to lock the rhombic rings by installation pre-tightening in a power failure condition and the rotary motion of the output shaft can be locked. The invention furthermore provides the actuation method for the actuator. The piezoelectric ceramics are driven according to a certain sequence, so that the high-precision large-torque rotary motion of the actuator can be output. The apparatus has the characteristics of light structure weight, small size, capability of outputting large torque and large rotary angle, and low power consumption of self-locking in power failure. The apparatus and the method have wide application prospects and extremely high application values.

Description

technical field [0001] The invention relates to an actuating device driven by piezoelectric ceramics, in particular to a high-precision and high-torque piezoelectric rotary actuating device and method with an H-shaped structure. Background technique [0002] In recent years, the continuous development of piezoelectric drive devices has supported the development and construction of important industries such as national defense, aerospace, and machinery manufacturing, and has also derived a wide variety of piezoelectric actuators. Piezoelectric ceramic actuators are difficult to achieve large stroke output, especially the torque output of large rotation angle is more difficult to achieve. Therefore, there is an urgent need for a step-by-step rotary actuating device with a simple and lightweight structure, a large driving stroke and a high resolution. SUMMARY OF THE INVENTION [0003] In order to meet the above requirements, the purpose of the present invention is to provide...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/10H02N2/12
CPCH02N2/101H02N2/12
Inventor 宋思扬徐明龙邵恕宝刘开园陈楠
Owner 西安朗威科技有限公司
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