An Inertial Piezoelectric Stack Actuator with Magnetorheological and Electromagnetic Coupled Friction Adjustment

Abstract

The invention relates to an inertial piezoelectric stack driver with magnetorheological fluid and electromagnetic coupling and friction regulating, belonging to the technical field of piezoelectric precision driving. A long clamping block is fixedly connected in that middle of the move body, two cantilevers are fixed on the long clamping block, the short clamping block is fixedly connected with ascrew, the outer end of the cantilever is fixedly bonded with a piezoelectric stack, the other end of the piezoelectric stack is fixedly bonded with a mass block, a friction disk is fixedly installedat the bottom of the long clamping block, and the friction disk is immersed in a magnetorheological fluid; The two sides of the moving body are linear guide rails, the linear guide rails are fixedly installed on the two side plates, the side plates are fixedly installed on the base, an electromagnetic coil with a magnetically conductive shell is arranged on the base, and a sealing strip and a sealing strip are sealed in the middle to form a container cavity for placing the magnetorheological fluid. The invention has the advantages that the friction adjustment of the actuator is realized by using the coupling of the magnetorheological fluid and the electromagnetic coil, the friction and wear in the traditional sense are reduced, and the precision and the life of the actuator are improved.

Description

technical field [0001] The invention belongs to the field of tiny and precise driving. Background technique [0002] In recent years, with the rapid development of micro-nano drive technology, the drive requirements for micro-miniature machinery have increased year by year in the technical fields of biomedicine, precision machinery, bionic robots, automatic control, precision measurement, precision operation, precision devices, and ultra-precision machining. . As the core technology to explore the microscopic field, micro-nano-level driving technology has become a research hotspot of scientific research institutions and scholars at home and abroad. Traditional precision mechanical drive methods generally adopt mechanical structures, such as screw pairs in precision lathes, rolling, sliding guide rails, precision spiral wedge mechanisms, etc. Even with ultra-high-precision mechanical structures, assembly gaps, friction and wear cannot be avoided. , crawling and other phenom...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to optimize the common solid-to-solid friction of the friction adjustment device in the piezoelectric actuator by introducing magneto-rheological fluid to couple with the electromagnetic coil, so as to solve the common piezoelectric actuator due to solid-to-solid friction Problems such as friction and wear, uneven distribution of friction force, difficulty in quantitative adjustment of friction force, etc.

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