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Thumb mechanism of artificial hand

A thumb and prosthetic hand technology is applied in the field of artificial prosthetic thumb mechanism to achieve the effects of small size, reliable movement and simple structure

Inactive Publication Date: 2013-01-30
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a thumb mechanism for an artificial hand to solve the problem that the thumbs of most existing prosthetic hands only have one direction grasping movement or a space grasping movement with a fixed track

Method used

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  • Thumb mechanism of artificial hand
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  • Thumb mechanism of artificial hand

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] Implementation of the thumb rotation function:

[0018] Such as image 3 As shown, the motor 7 rotates, the main shaft of the motor 7 is fixedly connected with the worm screw 5, the worm screw 5 rotates, the worm screw 5 and the worm wheel 6 implement worm gear transmission, the worm wheel 6 rotates, the worm wheel 6 is fixedly connected with the thumb rotation shaft 3, and the thumb rotation shaft 3 Rotate, the thumb rotation shaft 3 is fixedly connected with the cross connector 15, the cross connector 15 rotates, the cross connector 15 is horizontally hinged with the first knuckle rotation shaft 16, the first knuckle rotation shaft 16 rotates, and the first knuckle rotates The shaft 16 is fixedly connected to the first knuckle 17, and the first knuckle rotates, thereby realizing the rotation of the thumb.

[0019] In realizing the motion control that the thumb only rotates and does not bend, it should be ensured that the rotating speed of the motor 7 is the same as t...

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Abstract

The invention relates to a thumb mechanism of an artificial hand, in particular to a thumb mechanism of a humanoid hand and aims to solve the problem that a thumb of each of most existing artificial hand moves for grasp in one direction only. Rotation of a thumb of the thumb mechanism is achieved by worm-gear transmission. A function of bending for grasp is achieved for the thumb by worm-gear transmission and bevel gear transmission. A first knuckle and a second knuckle of the thumb are under-actuated by a plane four-bar mechanism. The thumb mechanism has the advantages that the thumb can rotate, bend for grasp and spatially move in a complex way during grasp motion of the thumb, the function of omnidirectional grasp can be achieved for the thumb, and various motion functions of a thumb of a human hand are achieved for the thumb of the thumb mechanism; a transmission mechanism of the thumb is in worm-gear transmission and has the self-locking function, and grasp torque of the thumb can be maintained after power failure of a motor; and the thumb mechanism is simple in structure, flexible to move, convenient to control, light in weight, small in size and large in thumb grasp strength.

Description

technical field [0001] The invention relates to an artificial hand thumb mechanism Background technique [0002] The motion form of the thumb is one of the main factors affecting the grasping function of the artificial hand. Most of the existing thumbs of the artificial hand only have the grasping function in one direction. Such a thumb must be set perpendicular to the palm of the artificial hand, and there is a big gap between the appearance and the function of the thumb of a real human hand. For this reason, many disabled people who need to install artificial hands are reluctant to use artificial hands. Thereby hindered the popularization and application of prosthetic hand. Although some related researchers have recently designed several thumb mechanisms with spatial grasping function, most of these structures have the following features: complex structure, certain thumb movement space and unable to realize multi-directional grasping functions. Contents of the invention...

Claims

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Application Information

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IPC IPC(8): B25J15/08B25J17/00
CPCB25J15/0009
Inventor 邓华高飞张翼段小刚
Owner CENT SOUTH UNIV
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