A high-precision rotary flexible hinge

Abstract

The invention discloses a high-precision rotary flexible hinge. The high-precision rotary flexible hinge comprises a left rigid part, a right rigid part and a flexible part, wherein the left rigid part and the right rigid part are symmetrically arranged and spaced by a certain distance, and the flexible part is connected between the left rigid part and the right rigid part. The flexible part comprises a plate-like long flexible unit, a plate-like first short flexible unit and a plate-like second short flexible unit, wherein the plate-like first short flexible unit and the plate-like second short flexible unit are identical in structure and symmetrically arranged with respect to the long flexible unit. The long flexible unit is connected between the left rigid part and the right rigid part along the horizontal central axis of the hinge, and the first short flexible unit and the second short flexible unit are symmetrically and vertically connected between the left rigid part and the right rigid part in the direction of the perpendicular bisector of the long flexible unit. The high-precision rotary flexible hinge is provided with multiple deformation units, and compared with traditional notch type smooth hinges, the flexible hinge has the advantages of being large in stroke and high in precision, and is suitable for high-precision smooth precision positioning platforms.

Description

technical field [0001] The invention relates to a flexible hinge, in particular to a point-symmetric multi-flexible unit rotating flexible hinge, which is suitable for technical fields such as precision machinery and robots. Background technique [0002] A compliant mechanism refers to a mechanism that uses the elastic deformation of its constituent materials to transmit or convert force, motion or energy. Compared with the traditional rigid mechanism, the compliant mechanism has been widely used in many cutting-edge fields such as micro-nano operation and precision measurement because of its unique excellent performance such as easy realization of high precision and miniaturization. [0003] Flexible hinges are one of the core components of compliant mechanisms. Flexible hinge refers to a kinematic pair structure that uses elastic deformation of materials to generate relative motion between adjacent rigid rods under the action of external force or moment. Compared with tr...

AI Technical Summary

Problems solved by technology

Most of the commonly used flexible hinges are notch-type flexible hinges. The biggest disadvantage is that the center of rotation drifts seriously, and it is difficult to improve the rotation accuracy in the case of large deformation.

In response to this problem, some scholars have proposed some high-precision rotating compliant hinges, such as V-shaped notch flexible hinges, but such hinges will generate stress concentration due to the sharp corners, which greatly limits the stroke of the hinge.

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