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Passive bending axial rotation mechanism based on cambered surface free ends and three-reed crossed reeds

A technology of axial rotation and free end, applied in the direction of non-rotating propulsion elements, etc., can solve the problem of passive deformation of bionic fish

Active Publication Date: 2019-12-10
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Passive bending axial rotation mechanism based on cambered surface free ends and three-reed crossed reeds
  • Passive bending axial rotation mechanism based on cambered surface free ends and three-reed crossed reeds
  • Passive bending axial rotation mechanism based on cambered surface free ends and three-reed crossed reeds

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Embodiment Construction

[0033] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0034] The overall structure of the embodiment of the present invention is shown in schematic figure 1, with six levels of cross reeds and three axially rotating cross reed units; the mechanism shown in the figure, the two ends of the cross reed that undertakes the bending task are connected to the free ends of the arc surface, and the two-stage bending cross reed units An axially rotating cross-reed unit is connected between them, and they are distributed according to the order: No. 1 curved cross-reed unit 1 connects to No. 2 curved cross-reed unit 2, and then connects to No. 1 axially-rotating cross-reed unit 3 , connect the No. 3 curved cross reed unit 4 and the No. 4 curved cross reed unit 5 in turn, then connect the No. 2 axially rotating cross reed unit 6, and connect the No. 5 curved cross reed unit 7 and No. 6 in turn No. bending cross reed unit 8, and ...

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Abstract

The invention relates to a passive bending axial rotation mechanism based on cambered surface free ends and three-reed crossed reeds. The whole multi-stage passive bending and axial rotation mechanismconsists of a plurality of crossed reed units with different sizes and varieties; and the structure of single crossed reed consists of two cambered surface free ends and the crossed reeds connected with the cambered surface free ends. Three reeds, the angle between two of which is 120 degrees, are crossed to form each crossed reed in charge of axial rotation deformation; the two ends of the reedare connected with the free ends; and when forming the passive bending and axial rotation mechanism, the reed units are connected by the corresponding free ends to form the multi-stage crossed reed structure. The passive bending axial rotation mechanism has the advantages of high precision, no friction, no hysteresis, no abrasion, no stiction, free of lubrication and the like, and can replace manysimilar passive deformation structures in the practical engineering application aspect.

Description

technical field [0001] The invention belongs to the field of multi-stage passive bending and axial rotation mechanisms, and relates to a passive bending axial rotation mechanism based on the free end of the arc surface and the cross reeds of three reeds, in particular to a multi-stage passive bending under the action of external force Mechanism for deformation and axial rotation. Background technique [0002] The passive bending mechanism is a mechanism that produces bending deformation under the action of an external force. It is a very common mechanical structure, such as the springboard of divers and the bow body of bows and arrows. The traditional passive bending deformation mechanism is generally similar to a simple cantilever beam, or a mechanism connected by a rotary mechanism with friction, which has great limitations in deformation. For a bending mechanism similar to a cantilever beam, its deformation accuracy is low because it is a single-stage deformation structu...

Claims

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Application Information

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IPC IPC(8): B63H1/36
CPCB63H1/36
Inventor 曹勇潘光贺俊杰路阳黄桥高曹永辉
Owner NORTHWESTERN POLYTECHNICAL UNIV
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