Five-finger independently-driven mechanical artificial hand

Abstract

The invention discloses a five-finger independently-driven mechanical artificial hand, which comprises five fingers and a wrist and is characterized in that the fingers and the wrist commonly have 19 degrees of freedom, wherein each finger is respectively provided with three joints, i.e. a distal interphalangeal joint, a proximal interphalangeal joint and a metacarprophalangeal joint; three joints of each finger are connected with a drive motor through a first line and a second line so as to draw each finger to move; the wrist is provided with three joints, i.e. a joint rotating around a z shaft, a joint rotating around an x shaft and a joint, which is arranged between the joint rotating around the z shaft and the joint rotating around the x shaft, rotates around a y shaft; and the joints of the wrist are provided with windings of the drive motor for driving the wrist to rotate. Compared with the prior art, five fingers of the mechanical artificial hand have similar joint structures to fingers of people and higher degree of freedom; and in addition, the invention has the advantages of simple structure, light weight as well as good flexibility, low cost and flexible motion by pulling hand through lines, so that the invention is beneficial for the disabled to use in daily life.

Description

technical field [0001] The invention relates to a mechanical artificial hand in the field of rehabilitation medical engineering, in particular to a mechanical artificial hand controlled by user's myoelectricity. Background technique [0002] Hand movements are very dexterous and have complex functions. Although the existing mechanical simulation hands in the field of rehabilitation medical engineering have practicality in terms of weight and high grip, they have very low degrees of freedom in actual use. In addition, there are many mechanical simulation hands realized by bionics. In order to achieve a high degree of freedom, they ignore the problem of meeting the appropriate weight index and having a small grip, making them unsuitable for practical applications. For example, the products produced by existing manufacturers all have the following shortcomings: [0003] 1. The existing artificial hand with one to three degrees of freedom has only two to three fingers, and the...

AI Technical Summary

Problems solved by technology

[0003] 1. The existing artificial hand with one to three degrees of freedom has only two to three fingers, and the wrist is passively rotated, which needs to be adjusted during use, causing inconvenience to the disabled

In addition, the weight of the mechanical artificial hand is heavy, and it is difficult for the disabled to wear it for a long time;

[0004] 2. Some scientific research institutes have developed underactuated anthropomorphic manipulators. Due to the use of too many gear mechanisms, they are large in size, high in quality, and high in cost, making it difficult for disabled people to actually use them.

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