| 摘要 |
The present invention refers to transfemoral prosthesis for uniaxial knee and process for manufacturing same. This transfemoral prosthesis for an artificial knee joint includes an upper prosthesis joint component and a lower prosthesis joint component with a single axis, containing a system that simulates the knee retraction using a set of springs compressed during the gait and during the flexion of the knee, when the tip of the artificial foot is separated from the prosthesis, the spring releasing its energy for providing an extension effect during the gait, this springs being housed in a base special for these springs, so that these are compressed inside a guide rod mounted over a support base. The transfemoral knee prosthesis includes a safety mechanism for preventing the knee from being bent when the user considers it convenient. The main components of this knee prosthesis of a single axis are manufactured by CNC (Computer Numerical Control) mills and lathe, so that each instructi on edited by the manufacturing program assisted by computer has been depurated with the purpose of optimizing the manufacturing times, avoiding death times, unnecessary travels and the use of a multi machine operator in order to optimize resources and provide an added value to the product. The production of this prosthesis is designed with a flexible semiautomated manufacturing cell, however, this prosthesis may be reproduced in a conventional mill and lathe arrangement. Depending on the needs of demand of the product, the production cells may be expandable. The manufacture of this invention is based on the lean manufacturing principles that consider depurating and removing the programming code shown during the design step, so that reducing unnecessary machined steps that have been considered by the computed manufacture and which are unnecessary as these represent time of manufacturing cycle that do not add value to the product, removing useless time of displacement between working st ations. The manufacture of the components in situ represents the advantage of supplying any spare component in a quick, safe and affordable manner. The aforementioned characteristics are intended to optimize production costs for manufacturing a quality product, which is affordable for the most deprived sectors of the population. |
