Large-deformation flexible mechanism

Abstract

The invention provides a large-deformation flexible mechanism formed by connecting two large-deformation flexible hinges in series. Each large-deformation flexible hinge comprises six curve sheet flexible units, three inner arms and an outer ring, wherein one end of each curve sheet flexible unit is gathered on and fixed to a central point, the other ends of the six curve sheet flexible units are evenly distributed on and fixed to the outer ring, every two curve sheet flexible units are in axial symmetry to form a curve sheet flexible unit set, the three curve sheet flexible unit sets are in central symmetry about the central point, the three inner arms are located at the symmetry axis positions of the three curve sheet flexible unit sets respectively, one end of each inner arm is fixed to the central point, and the other ends of the inner arms are connected with mechanical input connectors. The curve sheet flexible unit sets are used for establishing the distributed-type blade-shaped rotary flexible hinges, when the centers of the hinges are subjected to the torque effect, the flexible hinges cannot generate the rotation center drifting phenomenon, under pure torque drive, the errors of the deformation positions of the hinges do not exceed 2%, and the rotation errors do not exceed 9%.

Description

technical field [0001] The invention relates to a hinge, in particular to a large deformation flexible mechanism. Background technique [0002] A flexible hinge is a special kinematic pair with a certain shape that is designed and processed through integration and uses elastic deformation of materials to achieve expected motion. Most micro / nano manipulation positioning platforms are flexible mechanisms that use flexible hinges as elastic movable joints, which have a series of advantages such as no gap, no friction, no lubrication, and high resolution. However, the traditional notch-type flexible hinge has a small motion stroke, and its application field is limited. At present, there are various forms of large-deformation flexible hinges, but linear reeds are mostly used as the basic flexible unit to form complex large-deformation flexible hinges. The movement stroke of the formed flexible hinge is small. [0003] At present, there are various forms of large-deformation fl...

AI Technical Summary

Problems solved by technology

However, the traditional notch-type flexible hinge has a small motion stroke and its application field is limited.

At present, there are various forms of large-deformation flexible hinges, but linear reeds are mostly used as the basic flexible unit to form complex large-deformation flexible hinges. The formed flexible hinge has a small movement stroke

[0003] At present, there are various forms of large-deformation flexible hinges, but linear reeds are mostly used as the basic flexible unit to form complex large-deformation flexible hinges. The formed flexible hinge has a small movement stroke

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