Two-degree-of-freedom spatial parallel mechanism for realizing one-dimensional rotation and one-dimensional movement

Abstract

The invention discloses a two-degree-of-freedom spatial parallel mechanism for realizing one-dimensional rotation and one-dimensional movement. Three branched chains are connected between a fixed platform and a movable platform; a first branched chain and a second branched chain have the same connection combination mode and are sequentially connected with universal hinges, movable pairs and spherical pairs from the fixed platform to the movable platform; and a third branched chain is sequentially connected with a rotation pair and a movable pair from the fixed platform to the movable platform. The invention has the advantages that: 1, the mechanism has a small number of moving members and greatly reduces the possibility that the members generate interference in the movement process, so that the phenomena of movement inflexibility caused by manufacturing and assembling errors can be greatly reduced; 2, one-dimensional rotation output and one-dimensional movement output of the movable platform can be realized; and 3, the mechanism has the characteristics of high speed, high efficiency, high rigidity and large working space.

Description

Technical field: [0001] The invention relates to a two-degree-of-freedom parallel mechanism, in particular to a two-degree-of-freedom space parallel mechanism for realizing one-dimensional rotation and one-dimensional movement. Background technique: [0002] With the rise of parallel mechanism with few degrees of freedom, parallel mechanism with few degrees of freedom has been widely used in CNC machine tools, robotics, medicine and other fields. The degrees of freedom of the most widely used parallel mechanisms are three degrees of freedom and six degrees of freedom. Parallel mechanisms with four and five degrees of freedom are also widely used, while parallel mechanisms with two degrees of freedom are rarely used. Among them, most of the two-degree-of-freedom parallel mechanisms realize two-dimensional movement or two-dimensional rotation, and there are few two-degree-of-freedom parallel mechanisms that realize one-dimensional movement and one-dimensional rotation. In the...

AI Technical Summary

Problems solved by technology

At present, the degrees of freedom of the most widely used parallel mechanisms are three degrees of freedom and six degrees of freedom. Parallel mechanisms with four and five degrees of freedom are also widely used, while parallel mechanisms with two degrees of freedom are rarely used. Among them, most of the two-degree-of-freedom parallel mechanisms realize two-dimensional movement or two-dimensional rotation, and there are few two-degree-of-freedom parallel mechanisms that realize one-dimensional movement and one-dimensional rotation.

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