Two-freedom parallel machine tool

Abstract

The invention discloses a two-freedom parallel machine tool, which comprises a base consisting of a baseplate and a support post vertical to the baseplate, and a parallel mechanism erected on the base, wherein the parallel mechanism comprises a crossbeam fixed on the support post of the base, motors and guide rails fixed on the crossbeam, slide blocks linked with the motors and sliding vertically along the guide rails, connecting rods linked with the slide blocks, and a platform linked with the connecting rods; the crossbeam is provided with a first motor, a second motor and a third motor, each motor corresponds to a guide rail and slide block combination, and each slide block is connected with a connecting rod; a first connecting rod linked with the first motor is positioned between a second connecting rod linked with the second motor and a third connecting motor linked with the third motor; the first and second connecting rods are hinged with the platform; and the third connecting rod is hinged to the middle of the first connecting rod. The two-freedom parallel machine tool has the advantages of high bearing capacity, good processing and assembly process, compact structure, high precision and high rigidity.

Description

technical field [0001] The invention relates to a two-free parallel machine tool. technical background [0002] Parallel robots have the advantages of compact structure, high rigidity, and high precision. They have attracted the attention of scholars at home and abroad, and have been widely used in the fields of mechanical processing, aerospace, and material handling and sorting. [0003] At present, most two-degree-of-freedom moving mechanisms adopt a parallelogram branch chain structure to realize the two-degree-of-freedom movement of the terminal platform, such as CN1628939A, CN2700064Y, CN2693428Y, CN1715009A and CN2741730Y. The force is small, and each moving component is easily deformed and the rigidity is small. CN1718574A proposes adding two constrained branch structures, which does not fundamentally improve the problem of low stiffness in the vertical plane, and its control is relatively difficult. Peng Binbin proposed a two-degree-of-freedom translational robot. ...

AI Technical Summary

Problems solved by technology

[0003] At present, most two-degree-of-freedom moving mechanisms adopt a parallelogram branch chain structure to realize the two-degree-of-freedom movement of the terminal platform, such as CN1628939A, CN2700064Y, CN2693428Y, CN1715009A and CN2741730Y. The force is small, and each moving component is easily deformed and the rigidity is small

CN1718574A proposes to add two constrained branch structures, but it does not fundamentally improve the problem of low stiffness of the vertical plane, and its control is more difficult

Peng Binbin proposed a two-degree-of-freedom translational robot. This mechanism adopts the form of a spherical joint, and each moving rod is installed obliquely, and its processing and assembly process is poor.

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