Design and Fabrication of a Hoyer Lift

Hon, Mike Zhi Jie (2017) Design and Fabrication of a Hoyer Lift. Final Year Project (Bachelor), Tunku Abdul Rahman University College.

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Abstract

This final year project is to design and fabricate a hoyer lift to aid caregivers in handling patients. The objective of this project are to design a structure for the hoyer lift which consist of 3 parts, namely the base of the hoyer lift, top boom neck and a support beam. Secondly, to design a control system for the hoyer lift which consist of the electrical components and circuits that will be used for the hoisting system. Thirdly, to fabricate the hoyer lifts with the integrated control system based on the designs done in the earlier stages. Lastly, to test the design using SolidWorks and do actual field test on the prototype to ensure that the design is working based on design. In the beginning of this project, problem statement and literature review is done on the project idea. The process is then followed by preliminary designs where ideas were sketched on paper and it is then evaluated using selection matrix where selection criteria is set and scored, by doing so the finalized design sketch is then drawn using SolidWorks with proper scale constructing the first conceptual design of the hoyer lift. Discussion were further made to ensure that if there is room for modifications design can be improved. During this stage, component sourcing was started to ensure that all the required parts are available for the fabrication of the prototype. Selections criteria and reasons listed down and can be referred in Chapter 2 Literature Review. This project consist of two main system, which is the structure and the gearbox components. The parts for the structure was fabricated first, followed by the parts for the gearbox. Testing of the prototype was started after assembly of both parts and integration is done. The prototype was completed according to planned. Regarding the structure it meets the initial design requirement to sustain 100 kg load, but as for the lifting mechanism the maximum load that theoretically can lift is only 86.1 kg which is caused by gearbox ratio is not according to plan as there is some difficulties in sourcing the required part therefore decision have been made to proceed with the highest available set of ratios gear obtainable.