Fabrication of Load Lifting Trolley

Abstract

In a developing country like Pakistan, many buildings do not possess the facility of elevators and the primary mode of access between different floors is stairs. The purpose of this project is to design and fabricate a load lifting stair climbing trolley that will move heavy load through stairs without any inconvenience. There are several designs for this purpose now available, however they are not ideal owing to a variety of difficulties. There is a single-wheeled trolley design for moving loads, but it is not capable of moving things up and down stairs in a smooth manner. There is tri wheel trolley design to move objects through stairs but the main issue with them is that their motion along the stairs is not very smooth, they produce jerks while moving across stairs and there is a less load limit as well that can be carried. The jerky motion is caused by the tri wheel mechanism's dimensions not matching the stair step size, resulting in bumps as the trolley goes down the stairs. The design we're concentrating on is a trolley with a conveyor belt mechanism at the back that will generate smooth mobility along the stairwell. This design will be a great problem solver for people, and it will be very useful for those individuals who are handicapped and old and require care in a multi-storied building. This design is the best possible solution among all other designs aimed at solving this problem. The design will be powered with the help of a battery and high torque motor which will help to easily move heavy loads without much effort. Ergonomics factors are also taken into consideration while designing the structure of the trolley. After the design was finalized, an analysis of design was done in order to check for the safety of this design. Different types of materials were taken into account for the fabrication process keeping in mind the cost and durability of the available parts in market. Once the design was finalized and analysis was done, fabrication process starts which is one of the key objectives of our project.