Design and fabrication of a statically stable stair‐climbing robotic wheelchair

Abstract

Purpose The purpose of this paper is to present the mechanical design and stability analysis of a new stair‐climbing robotic wheelchair. Design/methodology/approach A prototype stair‐climbing robotic wheelchair is constructed comprising a pair of rotational multi‐limbed structures pivotally mounted on opposite sides of a support base. The short arm, long arm, and triangular support structures within each rotational multi‐limbed structure rotate under the actuating effects of epicyclical gear trains. Findings The robotic wheelchair ascends and descends stairs in a statically stable manner and has an efficient planar navigation capability. Research limitations/implications In its current state of development, the robotic wheelchair is controlled and powered remotely via umbilical cords rather than an onboard processor and power supply. Practical implications The robotic wheelchair provides an effective solution for enhancing the mobility of the elderly and disabled. Originality/value The rotational multi‐limbed mechanisms are developed to ensure the stability of the sitting base at all stages of the stair navigation maneuver without the need for additional servo‐mechanism. The proposed robotic wheelchair shows the simplification of the associated operation process.