DESIGN OF STAIR-CLIMBING WHEELCHAIR USING TRI-WHEEL MECHANISM

The objective of this work is to develop a mechanism for climbing up and down over stairs for physically disabled people. The mechanism involved is a tri-wheel mechanism for climbing up and down stairs. The modeling is done in SolidWorks designing software and analysis is carried out in ANSYS software. Tri-wheel mechanism is a unique mechanism for climbing stairs. The analysis is carried out by considering three different materials and the best material is suggested for fabrication. The mechanism involved is a tri-wheel mechanism which is unique and simple in design for climbing stairs. The shaft is designed based on theoretical force analysis and the wheelchair is designed. The design of components is done using SolidWorks software and analysis is done using ANSYS software. Stress, strain, and deformation analysis are done by considering three different materials and best material is suggested. The tri-wheel mechanism is simple for fabrication and it reduces the total cost of fabrication of wheelchair. These results will help to design of shaft based on human weight. With the help of tri-wheel mechanism stair-climbing wheelchair, we can move easily up and down on stairs without building ramps in hospitals, by this construction area and money can be reduced for building hospitals.