High-precision micro-gripper

Abstract

The invention discloses a high-precision micro-gripper. The high-precision micro-gripper comprises a platform base, micro-force drivers, micro gripping pliers and a stress magnet. The platform base is of a symmetrical structure and provided with symmetrically-distributed screw holes. The micro-force drivers are arranged on the platform base symmetrically. The micro gripping pliers are arranged on the symmetrical center face of the platform base. Each micro-force driver comprises two piezoelectric ceramic pieces, a super-magnetic expansion piece located between the two piezoelectric ceramic pieces, a permanent magnet arranged parallel to the super-magnetic expansion piece and two magnetic fixing yokes. The two magnetic fixing yokes are located at the two ends of the super-magnetic expansion piece, the piezoelectric ceramic pieces and the permanent magnet and grip the super-magnetic expansion piece and the permanent magnet. According to the high-precision micro-gripper, the controlled precision of the magnitude of the gripping micro force of the micro-gripper is high. In addition, the power consumption is low, the amount of emitted heat is small, and the precision stability is good.

Description

【Technical field】 [0001] The invention relates to the technical field of micromechanical assembly tools, especially the technical field of micro grippers. 【Background technique】 [0002] The rapid development of microelectromechanical systems (MEMS) has changed from the field of "microelectronics-mechanical" to "micromechanical-electronics". There are more and more tiny mechanical structural parts in MEMS devices, which are becoming more and more complex. In particular, automated micromechanical assembly poses enormous challenges. [0003] The assembly of traditional micromechanical parts relies on microgrippers, which are widely used, but there are the following problems: [0004] 1) The control accuracy of the clamping force of the micro-gripper is low, and the clamped parts are easily damaged; [0005] 2) The power source of the micro gripper is generally a device with a heat source such as a linear motor or thermal expansion, and thermal deformation factors affect the ...

AI Technical Summary

Problems solved by technology

[0004] 1) The control accuracy of the clamping force of the micro-gripper is low, and the clamped parts are easily damaged;

[0005] 2) The power source of the micro gripper is generally a device with a heat source such as a linear motor or thermal expansion, and thermal deformation factors affect the operation accuracy

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