Implementation of a propulsion system that can be attached to an autonomous translation wheelchair for paraplegic people

Abstract

Introduction: The design of a traction system anchorable to a wheelchair for the transport of paraplegic people in urban regions was presented and materialized. Objective: Implementation of a propulsion system that can be attached to an autonomous translation wheelchair for paraplegic people. Methodology: Based on the previously established design parameters, an electric traction system was chosen consisting of a 350 Watt brushless motor, a 36 volt 9 amp lithium ion battery and a 15 amp controller. Results: Using CAD software, the anchorable traction prototype was modeled, and with the help of CAE software, the design was validated, reaching appropriate results with respect to safety factors and deformations. It is worth mentioning that A36 steel was selected for the design, since It has a high strength/weight ratio. Subsequently, the manufacturing of the traction prototype was conducted, applying processes such as: tungsten inert gas (TIG) welding for the assembly of the different components of the frame, also cutting, bending, among others. Subsequently, the electrical elements of the electrical system were coupled. Conclusions: The required functional tests were carried out, they determined that the prototype satisfactorily fulfills its established function, since it is capable of propelling a wheelchair together with its occupant in a trajectory whose slope is up to 12% with a speed of 5 km/h, while on a flat road it reaches 20 km/h; In terms of autonomy, the system can travel up to 16 km at full load. It is recommended in subsequent design work, opt for less dense materials, in such a way that it favors reducing energy consumption. General study area: Engineering. Specific study area: Design and construction.