Vibration is an ergonomic challenge for tractor drivers in Zimbabwe. A special mini tractor chassis suspension type for towing was designed, and diagrams of simulations of the chassis and suspension were included in this analysis. A design methodology was used that included tools such as reverse engineering, computer-aided engineering software, and finite element analysis. Finite Element Analysis was used to determine the forces that can be attained by the chassis. Material selection was included, and a selected material simulation was performed, which showed favourable results. The chassis is the major component where the engine, gearbox, and all other controls are mounted. The results presented are the structural characteristics of a modern mini tractor chassis attached to suspension leaf springs. Von Mises using Invertor Computer Aided Design (CAD) software was performed to identify critical regions and obtain design modification.
An investigation was carried out on the effects of unsafe ergonomics practices by tractor operators in industrial companies in Zimbabwe. The survey was conducted in companies that manufacture tiles and bricks, collect waste litter using trailer-towed tractors, and construction companies. The investigation used a questionnaire to survey 15 operators in these different companies. Among other complications, Low Back Pain (LBP) affected all operators in the abovementioned industries. Other general complications noted were hand and leg pain, headaches, and chest pains. The Quality Function Deployment (QDF) important matrix indicated that investigating ergonomic effects is crucial. This paper concludes that reducing vibration and weight will provide a safer working environment for tractor operators and reduce the ergonomic effects investigated. Present ergonomic inventions and modifications must focus on producing a minitractor that dampens vibrations and improves the comfort of operator/tractor drivers.
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