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Multi-stage passive bending mechanism based on cross reeds at parallel free ends

A technology of bending mechanism and free end, applied in the field of multi-stage passive bending mechanism, can solve the problem of passive deformation of bionic fish and other problems

Active Publication Date: 2019-11-22
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Multi-stage passive bending mechanism based on cross reeds at parallel free ends
  • Multi-stage passive bending mechanism based on cross reeds at parallel free ends
  • Multi-stage passive bending mechanism based on cross reeds at parallel free ends

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Embodiment Construction

[0025] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0026] This embodiment is a six-stage passive bending mechanism, including No. 1 cross reed unit, No. 2 cross reed unit, No. 3 cross reed unit, No. 4 cross reed unit, and No. 5 cross reed unit and No. 6 cross-reed unit.

[0027] The multi-stage passive bending mechanism based on cross-reeds is mainly composed of cross-reed units with different sizes, and the cross-reed units are composed of two planar free ends and a cross-reed connecting the two free ends. The size of the specific cross reed is determined according to the line type of the specific multi-stage passive bending mechanism. By changing the combination of different bending units, the stiffness and size of each stage of the entire multi-stage bending mechanism can be controlled at the same time, so that it can be precisely controlled. Stiffness distribution and multi-level bending deformation distribu...

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Abstract

The invention relates to a multi-stage passive bending mechanism based on cross reeds at parallel free ends. The multi-stage passive bending mechanism is composed of a plurality of cross reed units ofdifferent sizes. The cross reed units of different sizes are combined according to linetype demands of different bending mechanisms. The structure of the single cross reed is composed of two plate free ends and cross reeds connecting the two plate free ends. Each cross reed unit is formed by two equilong reeds which are staggered symmetrically along the length directions of the reeds. Compared with a conventional bending mechanism, the multi-stage bending mechanism based on the cross reeds has the advantages of being high in rotating precision, large in rotating range and small in stress. Based on researches on existing cross reeds, the moving process of the cross reeds can be analyzed well.

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 parallel free-end intersecting reeds, 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 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 structure. For a mechanism connected by a rotary mechanism with friction, fric...

Claims

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Application Information

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IPC IPC(8): B25J9/00B25J9/06
CPCB25J9/0009B25J9/06
Inventor 曹勇潘光路阳贺俊杰黄桥高曹永辉
Owner NORTHWESTERN POLYTECHNICAL UNIV