Cylinder fixation type four-bar mechanism intelligent artificial limb knee joint

Abstract

An intelligent prosthetic limb knee joint with a cylinder stationary type four-bar mechanism belongs to the fields of biological medicine engineering and rehabilitation assistant devices. The intelligent prosthetic limb knee joint with a cylinder stationary type four-bar mechanism includes a above-knee prosthesis part, a knee joint antebrachium, a knee joint postbrachium, a below-knee prosthesis part, a cylinder part, and a linear motor and a needle valve used for providing intelligent driving. The cylinder part is fixed on the below-knee prosthesis part through positioning pins; a pendulum bar is additionally disposed between the upper end of a piston rod and the above-knee prosthesis part, and a torsional spring is assembled on the upper shaft of the pendulum bar. During the knee joint movement, the product of the invention moves following the below-knee prosthesis only and does not swing itself, thus, during the knee joint movement, the influence of large space occupation and great additional rotary inertia caused by relative swing of the cylinder body on pace control are avoided. At the same time, the linear motor and the needle valve are assembled at the lower end of the cylinder body, the intermediate parts are reduced, the costs for manufacture and maintenance are lowered and the operation accuracy and operation efficiency are enhanced.

Description

technical field [0001] The invention relates to a prosthetic knee joint, in particular to a cylinder-fixed four-bar mechanism intelligent prosthetic knee joint, which belongs to the technical field of biomedical engineering and rehabilitation aids. Background technique [0002] The lower limb prosthesis with intelligent knee joint can automatically adjust the control torque of the prosthetic knee joint with the change of walking speed and joint angle, so that the prosthetic gait is closer to the gait of healthy people in terms of symmetry and followability, and has less physical exertion. , safety and bionicity are good, and have been popularized and applied. [0003] At present, more intelligent knee joint products on the market are intelligent knee joints with swing cylinders. Companies such as Nabok in Japan, Yingzhongnai in the United Kingdom, and Delin in Taiwan all produce such products. These products are all developed on the basis of the research results of Nakagawa...

AI Technical Summary

Problems solved by technology

Although the use of linear motors to control the movement of the cylinder needle valve of the prosthetic knee joint can bring advantages such as weight reduction, lower manufacturing and maintenance costs, but if the commonly used cylinder body swing installation structure is still used, it will cause the cylinder body to grow, resulting in occupancy. Excessive space, thus increasing the length of the prosthetic knee joint

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