An active-passive combined prosthetic knee-ankle joint hydraulic circuit with energy recovery function

Abstract

The invention discloses an active-passive combined prosthetic knee-ankle hydraulic circuit with energy recovery function, which aims to solve the problems of high energy consumption and short battery life of an active hydraulic prosthetic system. The hydraulic circuit includes a motor, a coupling and a hydraulic pump. , the first accumulator, the second accumulator, the adjustable flow valve, the knee joint hydraulic cylinder, the ankle joint hydraulic cylinder, the first three-position four-way proportional valve, the second three-position four-way proportional valve, the third three-position Four-way proportional valve, first pressure sensor, second pressure sensor, third pressure sensor, fourth pressure sensor, fifth pressure sensor, sixth pressure sensor, first pipeline and second pipeline, the present invention uses three positions The four-way proportional valve controls the accumulator to absorb and release the energy in the process of human walking. Combined with the active and passive hybrid drive mode, the energy consumption of the system is effectively reduced, and the performance of the lower limb prosthesis is significantly improved. At the same time, the structure is simple and easy to achieve lightweight.

Description

technical field [0001] The invention relates to the technical field of hydraulic control, in particular to an active-passive combined prosthetic knee-ankle joint hydraulic circuit with energy recovery function. Background technique [0002] According to the second national sample survey of disabled people, it is estimated that the number of amputee patients in China is 2.26 million, of which 70% are lower limb amputee. Prosthetics are one of the important means to solve the mobility impairment of many patients. It uses bionic mechanical structures and drive systems to compensate the functions of the missing limbs of disabled people and reproduce the biomechanical characteristics of their missing joints. [0003] Existing studies have shown that during human walking, there is significant energy transmission between the knee and ankle joints, thereby reducing walking energy consumption. Currently, the vast majority of knee prostheses are non-powered, and users need to consume...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of high energy consumption, short battery life, and uncontrollable energy absorption and release of the foot in the existing lower limb prostheses in the background technology, and to provide an active-passive combined prosthetic knee-ankle hydraulic joint with energy recovery function. loop

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