Novel actuator with two-stage amplification mechanism and that provides axial magnetic field with bar

Abstract

The invention discloses a novel actuator provided with a two-stage amplification mechanism and that provides an axial magnetic field with bars. The novel actuator comprises a non-magnetic-conductive shell, a magnetic-conductive frame, a magnet exciting coil, a combined body, the two-stage micro-displacement amplification mechanism and an output rod. The magnet exciting coil is sleeved outside thecombined body and is placed in the magnetic conductive frame, and the magnetic conductive frame and the combined body form a closed magnetic circuit; the magnetic conductive frame is arranged in the non-magnetic conductive shell; one end of the combined body is connected with the magnetic conductive frame, the other end of the combined body is connected with the input end of the two-stage micro-displacement amplification mechanism; the combined body is used for transmitting displacement to the two-stage micro-displacement amplification mechanism, the fixed end of the two-stage micro-displacement amplification mechanism is connected to the magnetic conductive frame, the output end of the two-stage micro-displacement amplification mechanism is connected with the rear end of the output rod, and the front end of the output rod extends out of the non-magnetic shell; the two-stage micro-displacement amplification mechanism amplifies the displacement of the combined body and transmits theamplified displacement to the output rod; and the output rod is used for outputting the displacement. The output displacement of a driver is increased, and the size of the driver is reduced.

Description

technical field [0001] The invention relates to a precision control technology, in particular to a novel actuator with a two-stage amplifying mechanism that a bar provides an axial magnetic field. Background technique [0002] In recent years, various drivers with high resolution and fast response have been widely used in various fields such as microelectronics, nanotechnology, biomedical engineering, and precision machining. With the continuous development of technology, higher requirements are put forward for various indicators of the driver. Giant magnetostrictive materials have a series of excellent characteristics such as large strain value, high response speed, high energy density, large electromechanical coupling coefficient, high reliability, etc., and show good application prospects in the field of actuators. [0003] For some environments that require a lower output range, such as below 100μm, or some environments that have no limitation on the volume of the drive...

AI Technical Summary

Problems solved by technology

However, there are some problems in this design: in order to ensure the symmetrical structure when the volume of the magnifying mechanism is constant, the effective horizontal structure for the magnification is only 1 / 2, and when the magnification is guaranteed, the overall horizontal structure is will double in size

The output displacement of the magnetostrictive rod is amplified by using the first to third level levers. Its radial volume is large, and because there are many parts in the amplification mechanism, the assembly complexity in the small-volume driver is relatively high, and it is difficult to realize. At the same time, it causes Its output accuracy and reliability decrease

[0008] With the continuous miniaturization of various precision devices, the requirements for the driver are also increasing. Although the existing method of placing the amplifier inside the driver can reduce the size of the driver, the volume of the amplifier part will still be large. Restricting its use, how to keep the size of the driver miniaturized while obtaining a large output displacement is still an unresolved problem

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