A Two-DOF Scaling Mechanism Based on Similarity of Four-bar Mechanism

Abstract

The invention discloses a two-degree-of-freedom scaling mechanism based on four-bar mechanism similarity, which comprises a support, a first connecting bar, a second connecting bar, a third connecting bar, a fourth connecting bar, a fifth connecting bar and a sixth connecting bar. The left part of the first connecting bar, the left part of the second connecting bar, the third connecting bar and the fourth connecting bar compose a four-bar mechanism; and the right part of the first connecting bar, the right part of the second connecting bar, the fifth connecting bar and the sixth connecting bar compose another four-bar mechanism. In the process of the motion of the mechanism, the two four-bar mechanisms are always similar quadrangles. The mechanism has the advantages that the mechanism can scale any plane figures; the structure is simple and compact, and the occupied space is small; since the mechanism is symmetrical, static balance can be easily realized; and mechanisms designed on the basis of the same principle have a lot of configurations.

Description

technical field [0001] The invention relates to a two-degree-of-freedom scaling mechanism similar to a four-bar mechanism, which belongs to the field of mechanism design and synthesis. Background technique [0002] The zoom mechanism is a kind of mechanism that can realize the similar output of the source point and the imitation point, and scale up. Since the appearance of the scaling mechanism, it has been mainly used in the fields of graphic scaling, pattern engraving, robot leg mechanism design, mechanical arm design, mechanism static balance design, reverse drive mechanism design, etc. For example, the patent CN2493372Y "Spherical Mobile Robot" proposes to use a symmetrically arranged scaling mechanism as the leg mechanism to realize the flexible movement of the robot on the spherical wall; The balance of the robot's center of mass. However, although the current scaling mechanism is widely used, its structure is often not compact enough and needs to occupy a large spac...

AI Technical Summary

Problems solved by technology

However, although the current zoom mechanism is widely used, its structure is often not compact enough and needs to occupy a large space; and the asymmetry of the existing zoom mechanism itself also limits its use.

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