Horizontally-arranged six-degree-of-freedom constant-rigidity mechanism

Abstract

The invention discloses a horizontally-arranged six-degree-of-freedom constant-rigidity mechanism which comprises an upper platform, a bottom plate, composite spherical hinges, a spherical hinge, supporting rods, a guide rail sliding block assembly and six electromagnetic rigidity-adjustable units of the same structure. The two ends of a shaft, fixedly provided with a permanent magnet, in each electromagnetic rigidity-adjustable unit are fixed to the bottom plate through shaft supports, shells moving in the axial direction in the electromagnetic rigidity-adjustable units are fixed to a sliding block of the guide rail sliding block assembly through sliding block base plates, and the guide rail sliding block assembly is fixed to the bottom plate. The spherical hinge is installed at the top of the shell, the three composite spherical hinges are evenly installed at the bottom of the upper platform, one end of each supporting rod is in threaded connection with the spherical hinge, and the other ends of the supporting rods are in threaded connection with the composite spherical hinges. According to the horizontally-arranged six-degree-of-freedom constant-rigidity mechanism, when the pose of a system or an external load changes, the rigidity of the system can be kept constant through current control.

Description

technical field [0001] The invention relates to the technical field of vibration isolation systems, in particular to a horizontally arranged six-degree-of-freedom constant stiffness mechanism. Background technique [0002] In today's industrial design, many design standards and experience show that factors such as the mechanical stiffness of the mechanical device, the load-bearing capacity and sensitivity of the mechanism, all determine the function and service life of the mechanical equipment to a large extent. Among them, the stiffness of the mechanism is an inherent attribute of the mechanical system, which represents the bearing capacity of the system and the ability to resist external disturbances. At the same time, for the same mechanical equipment, changes in the position or attitude of the mechanism during operation often lead to changes in the stiffness of the system, and changes in stiffness may cause a decrease in the bearing capacity of the system, or even change...

AI Technical Summary

Problems solved by technology

At the same time, for the same mechanical equipment, changes in the position or attitude of the mechanism during operation often lead to changes in the stiffness of the system, and changes in stiffness may cause a decrease in the load-carrying capacity of the system, or even change the natural frequency of the system to cause resonance

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