Multi-axis hydraulic control bionic knee joint

Abstract

The invention provides a multi-axis hydraulic control bionic knee joint, which is characterized by comprising an upper joint body and a lower joint body; the upper joint body and the lower joint body are rotatably connected together by a rotary shaft; a buffer device for changing an included angle between the upper joint body and the lower joint body is arranged between the upper joint body and the lower joint body, and a hydraulic cylinder is arranged in the upper joint body and the lower joint body. The multi-axis hydraulic control bionic knee joint provides a knee bending support function to finish knee bending walking by an elastic geometric locking device in gait walking, provides an adaptive variable speed walking function by a hydraulic adjusting device, and thus has the knee bending walking and variable speed walking of a normal human body joint, and the durable years of the artificial limb knee joint are greatly prolonged by adopting a needle bearing instead of a conventional axle sleeve.

Description

technical field [0001] The invention relates to the field of artificial joints, in particular to a multi-axis hydraulic control bionic knee joint. Background technique [0002] With the advancement of science and technology, lower limb prosthetics have replaced crutches, which not only make up for the shortcomings of limb defects in appearance and function, but also enable amputees to freely participate in normal work and life with their hands, expanding the participation of amputees in society. depth and breadth of activities. [0003] The prosthetic joint is the core component of the thigh prosthesis. It not only supports the body weight during walking, but also its performance plays a decisive role in the gait fidelity of the prosthesis. The symmetry between the prosthetic side and the healthy side is an important index to measure the performance of the prosthetic joint. At present, the flexion and extension of the prosthetic knee joints on the market are all driven by ...

AI Technical Summary

Problems solved by technology

[0005] At present, domestic knee joint products are at a relatively low-end level. The joint structure is simple and the stability in the support phase is weak. The swing phase is mostly controlled by mechanical and air pressure. The speed change range is small and the followability is poor. The service life of the knee joint is short, so the current domestic knee joint can only perform simple rigid support (that is, no elastic knee flexion function) and weak variable speed walking. These designs largely limit the user's range of motion and functional requirements.

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