Active-passive type ankle joint prosthesis and movement mode thereof

Abstract

The invention discloses an active-passive type two-degrees-of freedom ankle joint prosthesis, comprising a carbon fiber energy storage sole, a motor, a speed reducer, a motor fixing supporting seat, a belt pulley transmission device, a carbon fiber pipe, a ball screw, an energy storage springs, joint bearings, energy storage rubber rings and joint supporting seats, wherein the carbon fiber energy storage sole is connected with the carbon fiber pipe through the joint supporting seats; the motor fixing supporting seat is connected with the carbon fiber pipe through an active pin; the motor is fixedly arranged on one end of the motor fixing supporting seat; the ball screw is fixedly arranged on the other end of the motor fixing supporting seat; two ends of the motor fixing supporting seat are connected by the belt pulley transmission device; the energy storage springs areis connected with a ball screw nut; and the energy storage rubber rings are connected with the joint bearings and the joint supporting seats through a shaft. The ankle joint prosthesis provided by the invention not only can completely provide required energy for human gait, but also can adapt to various landforms; in addition, the ankle joint prosthesis can completely imitate movement angles of a human ankle joint on a sagittal plane or a coronal plane; and therefore, the normal walking requirement of an amputation patient can be satisfied better.

Description

technical field [0001] The invention relates to a human prosthesis, in particular to an active and passive dual-degree-of-freedom ankle prosthesis capable of simulating the driving and energy storage functions of human ankle joint muscles and its motion mode. Background technique [0002] Prosthetics are an essential device for the daily life of amputees. The lower limb ankle prosthesis is an example. Its main function is to replace the missing limb and assist the patient to walk normally. The human ankle and foot not only have the function of active driving, but also have the function of energy storage and cushioning. The most ideal ankle prosthesis should be able to fully simulate the active drive and energy storage characteristics of the human ankle and foot, as well as the gait characteristics of the human ankle joint. However, the vast majority of ankle prostheses on the market so far are passive. Although the introduction of carbon fiber soles can achieve energy sto...

AI Technical Summary

Problems solved by technology

Although their prosthetics can provide the energy required for human gait, their ankle prosthetics are also single-degree-of-freedom

[0004] So far, motor drive is still an effective and mature means to realize active prosthetics. However, due to the large mass and volume of the motor, it will be difficult and cumbersome to realize dual-degree-of-freedom active ankle prostheses.

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