Design and Fabrication of stair climbing mechanism lift load over stair

Mechanical engineering

Stair lift is transportation technology with electrical mechanical equipment to assist vertical movements in buildings, and it is used specifically and individually by the elderly and people with disabilities. This paper has two objectives. The first is to optimize the ability of the existing stair lift structure by developing lighter stair lift designs and materials without reducing the capability of the stair lift. The second is to design a braking system on the stair lift. The optimization of a stair lift structural design is needed to ensure that the strength of the stair lift structure complies with the requirements of ASME standard 18.1. The methodologies of this study are redesigning and conducting numerical simulations with the finite element to get the optimum result. Numerical simulations on the guide rails were carried out on A36 steel and 6063 T5 aluminium materials by comparing 30° and 45° stair lift inclinations. The maximum load is 270.4 kg. The distance of support is 1000 mm. From the simulation results, the 6063 T5 aluminium profile can be used as a material substitution for guide rails. The chains for driving links need to be strengthened by adding the dimensions of the chain or increasing the number of chains. The maximum temperature distribution on the disc brakes is 130.56 °C. In this system, we use DC motor for changing the polarity of the power supply which will make the motor run in reverse direction. The carriage run towards upward or downward direction with the help of Toggle switches and push buttons. As guide wheel roller bearings are attached with carriage, the movement of the carriage is like a linear tracking system. In compared with the conventional hydraulic lift, there are some advantages like no civil structure and alteration is required, low cost, less bulkiness, less power, less maintenance requires, easy design, easy installations.

This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.