Integrated multi-degree-of-freedom rigid-flexible coupling motion platform driven by ball screw

Abstract

The invention discloses an integrated multi-degree-of-freedom rigid-flexible coupling motion platform driven by a ball screw. The platform comprises an X-axis frame and a first flexible hinge platform, wherein the X-axis frame is externally connected with the power output end of a Y-axis driving device of a Y-axis frame, the side face of the first flexible hinge platform in the X-axis direction isconnected to the X-axis frame through a flexible hinge, the side face of the first flexible hinge platform in the Y-axis direction is installed on the X-axis frame through a spring piece type flexible hinge, and the corresponding first flexible hinge platform is arranged on each guide rail of the Y axis to isolate the influence of friction of the guide rails. According to the platform, the X-axisframe and an X-direction platform base are integrally machined and manufactured, other platform assemblies are directly installed on the X-direction platform base, an integrated two-degree-of-freedomplatform structure is adopted, a two-layer overlapping structure is avoided, the material cost is saved, and the gravity center of the whole platform is lowered.

Description

technical field [0001] The invention relates to a motion platform, in particular to an integrated multi-degree-of-freedom rigid-flexible coupling motion platform driven by a ball screw. 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 for existing platform bases such as figure 1 As shown, the rigid frame (105) and the first flexible hinge platform (106) jointly constitute a rigid-flexible coupling motion platform through a compound flexible hinge (107). The servo motor (101) is connected to drive the ball screw (103). The ball scr...

AI Technical Summary

Problems solved by technology

This two-layer superimposed structure has the following disadvantages: 1. Large consumables and high cost

The base of the motion platform in the Y direction will generate redundant consumables and additional costs, which is not conducive to industrialization

2. High center of gravity

The base of the motion platform in the Y direction raises the rigid-flexible coupling platform in the Y direction to a certain height in the Z-axis direction, and its center of gravity is raised, which may easily cause tipping during work.

3. As a load-bearing component, the first flexible hinge platform in the X direction needs to bear the mass of the base of the motion platform in the Y direction. Therefore, the first flexible hinge platform in the X direction has very high load-bearing rigidity requirements, and its flexible hinges will produce non-working directions. The deformation is extremely prone to fatigue life problems, and the work reliability is not high

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