Diseño y simulación de silla de ruedas bipedestadora para personas adultas con discapacidad física a nivel de paraplejia o con problemas de mobilidad de uso en interiores

Abstract

The objective of this technical project was to design and simulate a standing machine for people with paraplegia or lower limb disability for indoor use. Several bibliographic references from various authors were compiled and with this the fundamental design parameters were established, the characteristic of maximum load capacity of 120 Kg was taken, in addition to this the anthropometric specifications that allowed to configure the dimensions of the prototype together with the recommendations of the Ecuadorian standards for people with disabilities. The concurrent design method was used, which provides a weighting of the selection of alternatives to comply with the standards of the voice of the user and the voice of the engineer. An optimal standing mechanism based on a 4-bar mechanism was determined, with the application of a linear actuator as the main driving element, the workload was defined through the simulation executed in the MSCADAMS software, it was concluded that this actuator is 1000 N at 20 mm / s with a power of 10W giving the user a change from giving to biped in 8.5 seconds. The mechanical components of the prototype were calculated and designed theoretically and verified by modeling in SolidWorks software together with analysis by the finite element method in ANSYS software to verify stress and strain states under maximum load. It is concluded that the standing prototype under a change point mechanism is valid, generating a change from SE to bipedal to the user under ergonomic and user comfort conditions.