A Multistage Passive Bending Mechanism Based on the Crossed Reeds at the Free Ends of the Curved Surface

Abstract

The invention relates to a multi-stage passive bending mechanism based on crossed reeds at free ends of cambered surfaces, comprising a plurality of free ends of cambered surfaces and crossed reeds; The adjacent free ends of the arc surface form a first stage, and the bending stiffness of each stage depends on the material, thickness of the reed, the angle between the two reeds and the position of their intersection; in the cross-reed bending mechanism based on conventional parallel free ends , the arc free end used in this scheme, and the intersection point of the cross reed and the center of the cross reed unit relative to the center of the outer free end of the entire bending mechanism, which makes the intersection of each cross reed unit passive bending deformation. The offset has been reduced, making its deformation more accurate. When the free end is subjected to external force, it is better to deform along its force direction.

Description

technical field [0001] The invention belongs to the field of multi-stage passive bending mechanisms, and relates to a multi-stage passive bending mechanism based on crossed reeds at free ends of arc surfaces, and a mechanical mechanism for realizing multi-stage bending deformation under the action of external force. Background technique [0002] The passive bending mechanism is a mechanism that produces bending deformation under the action of external force. It is a very common mechanical structure, such as the springboard of a diver and the bow of a bow and arrow. The traditional passive bending deformation mechanism is generally similar to a simple cantilever beam, or a mechanism connected by a slewing mechanism with friction, which has great limitations in deformation. For a bending mechanism similar to a cantilever beam, because it is a single-stage deformation structure, its deformation accuracy is low. For a mechanism connected by a slewing mechanism with friction, fr...

AI Technical Summary

Problems solved by technology

The passive bending mechanism used in the article "Experimental Research on SMA Wire-Driven Bionic Tail Fin Propeller" in Volume 41, No. 7, 2013 of Micro-Special Motors is SMA wire. Since it bears active deformation at the same time, its passive deformation is affected by The restriction of active deformation cannot achieve the maximum passive deformation effect of bionic fish

Images