Bottom pre-tensioning type stick-slip driving cross-scale precision motion platform

Abstract

The invention discloses a bottom pre-tensioning type stick-slip driving cross-scale precision motion platform which comprises a base, a friction oscillator, an oscillator driving source and a sliding block, wherein a pre-tensioning force adjustment structure for providing pre-tensioning force is arranged between the bottom of the sliding block and the base; the pre-tensioning force adjustment structure comprises a V-shaped spring for providing the pre-tensioning force and an adjustment screw used for adjusting the V-shaped spring; the V-shaped spring is mounted on the base in a compression and deformation manner through the adjustment screw; the pre-tensioning force adjustment structure is used for adjusting the pre-tensioning force; a stick-slip effect occurs between the sliding block and the friction oscillator; and the sliding block performs cross-scale precision motion. According to the bottom pre-tensioning type stick-slip driving cross-scale precision motion platform, an adjustment manner of the pre-tensioning force of the motion platform is greatly simplified, and processing and assembly are facilitated, so that the output performance of the stick-slip driving cross-scale precision motion platform is effectively improved, the motion precision and consistency of the stick-slip driving cross-scale precision motion platform can be guaranteed simply and effectively, and the motion platform is suitable for batch production.

Description

technical field [0001] The invention belongs to the technical field of precision motion, and in particular relates to a bottom pre-tightened stick-slip driving cross-scale precision motion platform. Background technique [0002] Cross-scale precision motion technology with nanometer-level motion resolution and millimeter-level motion travel is the key technology in the field of micro-drives. Compared with other types of cross-scale motion driving methods, the stick-slip drive is simple, convenient, and easy to control, and has the advantages of large motion range, high resolution, simple structure, easy miniaturization, and precise positioning. A method that is widely used in the current cross-scale drive. The working principle of the stick-slip drive is mainly based on the friction force as the driving source, and uses the stick-slip effect to realize the tiny movement of the driven body. The difference between the forces is used to achieve precise motion across scales. ...

AI Technical Summary

Problems solved by technology

For the upper and lower spring preloaded stick-slip drive cross-scale precision motion platform, the related public technology has the publication number or patent number of WO2009043421A1, US6940210B2, US7579752B2, US20080148589A1 and other patents. Its working principle is mainly to divide the motion platform into upper and lower parts. The tension spring is used to adjust the friction force between the upper and lower parts and the friction vibrator. The tension spring adjusts the pre-tightening force through the thread structure, and the guiding is realized by the diamond-shaped friction surface. The adjustment range of the friction pre-tightening force is relatively small. Difficulty adapting to small differences in frictional interfaces

[0004] Although the above three kinds of stick-slip drive cross-scale precision motion platforms are different in the friction preload structure and adjustment methods, their common point is that the friction force preload structure and adjustment methods are too complicated to set As a result, the friction adjustment of the contact interface between the stick-slip friction vibrator and the motion platform is limited, the friction adjustment range is small, and the processing accuracy of the friction interface is high, which in turn leads to relatively high requirements for the processing and assembly accuracy of the stick-slip drive platform. High, ultimately affecting the motion accuracy and consistency of the cross-scale precision motion platform, so these existing technologies have technical problems such as complex manufacturing process and high manufacturing cost in ensuring the consistency of mass production of the cross-scale precision motion platform

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