Ball screw-driven rigid and flexible coupling platform capable of adjusting rigidity externally

Abstract

The invention discloses a ball screw-driven rigid and flexible coupling platform capable of adjusting rigidity externally. The ball screw-driven rigid and flexible coupling platform capable of adjusting the rigidity externally comprises a frame, a working platform and at least two groups of flexible hinges; the flexible hinges are respectively arranged on two opposite end surfaces in the directionof guide rails of the frame; the working platform is arranged in a groove of the frame in a sleeving manner and is not in contact with the frame; the two end surfaces of the working platform are fixedly connected to the flexible hinges; and the main working direction of the flexible hinges is the displacement direction of the frame. The ball screw-driven rigid and flexible coupling platform capable of adjusting the rigidity externally has the advantages that 1, the original assembling relationship can be ensured by replacing the flexible hinges group by group when the flexible hinges are replaced; 2, each group can adopt the flexible hinges with different thicknesses, and the rigid and flexible coupling platform can be adapted to a plurality of working occasions by arranging and combiningthe flexible hinges with different thicknesses; and 3, a plurality of groups of flexible hinges respectively adopt the flexible hinges with different thicknesses, and an optimal working assembly condition can be realized by changing the distribution of spring force as required.

Description

technical field [0001] The invention relates to a motion platform, in particular to a rigid-flexible coupling platform driven by a ball screw and externally adjusted for stiffness. Background technique [0002] Most of the existing ball screw drive platforms are highly rigid platforms, and the accuracy of the final positioning is limited due to the existence of the friction dead zone. However, with the development of science and technology, the precision requirements of platform equipment are getting higher and higher, requiring submicron or even nanometer levels, and it is difficult to achieve high rigidity platforms driven by traditional ball screws. [0003] figure 1 It is an existing rigid-flexible coupling platform with adjustable stiffness. Such as figure 1 As shown, A1 is the main body of the platform, and A2 is the stiffness adjustment mechanism, which are symmetrically arranged at the front and rear ends of the platform. Stiffness adjustment mechanism A2 is comp...

AI Technical Summary

Problems solved by technology

This rigid-flexible coupling platform with adjustable stiffness has the following disadvantages: 1. The flexible hinge is installed in the gap between the working platform and the rigid frame. 2. This rigid-flexible coupling platform adopts a composite flexible hinge structure, and the working area of ​​the working platform is very small, which is difficult to meet the actual industrial production needs.

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