Two-rotation and one-move series-parallel parallel driving swing head mechanism with follow-up constraint

Abstract

The invention provides a two-rotation and one-move series-parallel parallel driving swing head mechanism with follow-up constraint. The two-rotation and one-move series-parallel parallel driving swinghead mechanism comprises a mounting frame, a stretching-out body, a first stretching-out cylinder, a second stretching-out cylinder, a first linear driving unit, a second linear driving unit, a thirdlinear driving unit, a first connecting rod, a second connecting rod, a third connecting rod, a movable platform and an electric spindle. A parallel connection part of a series-parallel swing head only comprises two main driving branches and one follow-up constraint branch, thus compared with a parallel connection machining head with four or more moving branches, the number of branched chains issmall, and the two-rotation and one-move series-parallel parallel driving swing head mechanism has the characteristics of compact structure, high rigidity, large working space and good dynamic performance.

Description

technical field [0001] The invention belongs to the technical field of industrial manufacturing of numerical control machine tools, and in particular relates to a two-rotation-one-shift hybrid parallel drive swing head mechanism with follow-up constraints. Background technique [0002] Compared with the series mechanism, the parallel processing head has the advantages of high rigidity, high precision, and many degrees of freedom. It can realize curved surface processing in the field of mechanical processing and effectively improve the processing accuracy. and other industries have important influence. [0003] At present, most parallel processing heads are three-degree-of-freedom parallel mechanisms, such as the Z3 spindle head. Chinese patent 200910228104.7 discloses a parallel mechanism that can realize two-dimensional translation and two-dimensional rotation, including a fixed frame, a moving platform and four branch chain structures. The branch chain structure is compos...

AI Technical Summary

Problems solved by technology

Chinese patent 200910228104.7 discloses a parallel mechanism that can realize two-dimensional translation and two-dimensional rotation, including a fixed frame, a moving platform and four branch chain structures. The branch chain structure is composed of linear units and fixed-length rods. The four branch chains are surrounded by Evenly arranged, there is a singularity problem. In practical applications, the requirements for the servo motor are high, and the servo motor may even be damaged.

Chinese patent 201010507587.7 discloses a space four-degree-of-freedom parallel mechanism and a spraying robot. The spraying operation mechanism of this patent is a four-branch parallel mechanism, and the four linear drive branches directly drive the moving platform. The mechanism of parallel processing heads, and the layout of the mechanism has a singularity problem, and the motion state is not good

Through the above analysis, the existing parallel processing heads generally have the problems of poor rigidity, small working space, poor dynamic performance and inflexible movement due to many drive branch chains.

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