Large-stroke flexible two-dimensional motion platform

Abstract

The invention discloses a large-stroke flexible two-dimensional motion platform. The platform comprises a fixed base (4); a moving platform (1) coaxially arranged with the fixed base (4); and a flexible Hooke hinge (2) and linear actuators (3) placed between the moving platform (1) and the fixed base (4), wherein the four linear actuators (3) are symmetrically and uniformly distributed, the flexible Hooke hinge (2) is positioned in the middle of the four linear actuators (3), the two ends of the linear actuator (3) and the two ends of the flexible hooke hinge (2) are connected with the lower end face of the moving platform (1) and the upper end face of the fixed base (4) through screws respectively, threaded mounting holes are distributed in the fixed base (4) and used for being connected with an external structure, the flexible Hooke hinge (2) comprises an upper flexible hinge support seat (2-1), a middle moving block (2-2) and a lower flexible hinge support seat (2-3), and is connected with the moving platform (1) and the fixed base through screws, and the four linear actuators (3) are connected with the moving platform (1) and the fixed base through screws. The platform is suitable for high-precision large-stroke-angle movement application.

Description

technical field [0001] The invention belongs to a two-dimensional motion motion platform, in particular to a large-stroke flexible two-dimensional motion platform. Background technique [0002] Two-dimensional motion platforms are generally used to achieve high-precision two-dimensional pointing in the normal direction of the platform and are widely used in medical equipment, aerospace, industrial control and other fields. The traditional two-dimensional motion motion platform often adopts a two-axis four-frame structure combined with traditional rigid motion pairs including bearings to achieve two-dimensional rotation. This type of mechanism has a large working range and is widely used. However, there is also the problem that the movement accuracy is limited due to the influence of traditional rigid kinematic pair friction backlash during the movement process. [0003] Based on the above reasons, the present invention proposes a large-stroke flexible two-dimensional motion...

AI Technical Summary

Problems solved by technology

Although the first two flexible hinges have a simple structure and high rigidity, the rotation angle is small. Although the latter flexible hinge has a large rotation angle, the structure rigidity is small and affects the accuracy.

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