Human Factors in All-Terrain Wheelchair Design for Rural Population

摘要

Considering the geography, the public infrastructure and the products available in Colombia, there was identified an insufficiency in the supply of wheelchairs appropriated for the tough conditions of rural areas. In response, an all-terrain, three-wheeled and leveraged wheelchair was designed, using the user-centered design approach. The wheelchair was adapted to the anthropometric and anatomical characteristics of its users and considered arms biomechanics for the design of leveraged driving system. In addition, it was proposed the use of magnesium alloys to reducing the weight of the wheelchair frame, which helps to reduce the effort thus contributing to the preservation of upper limbs. The wheelchair was co-designed involving potential users in the design process. The digital model suggests a weight reduction of 75% to 55% compared to commercial models and shows adequate structural behavior. Currently, a functional prototype is being manufactured, which will be subjected to technical and usability tests.