Abstract
In this study, a trailer platform measuring 150×110 cm with a capacity of 700 kg was designed and the most suitable profile section dimensions and material were determined for low-cost production. 40×40×3 and 50×50×4 mm box profiles were used in the modelling. S355 (St52) steel in small section profile and S235 (St37) steel in large section profile was selected as Platform material. The analysis was conducted according to the finite element method and as a result of the static load analysis, stress value, displacement amount and safety coefficient data were reached in critical regions. According to research results, it was determined that the trailer with Profile section dimensions of 50×50×4 mm and made of S235 steel was more economical than the other. A leaf spring was used for the trailer's suspension arrangement and modelled on its commercially available counterparts in accordance with maximum load. As a result of load analysis, the greatest stress arising in the leaf spring was formed in the spring connections. In the study, the selection of axle, wheel hub, wheel, lever jack and coupling were made and the mass of each component was determined. Sheet metal, cabinet back cover, fasteners, etc. the total mass of the trailer, excluding components, was estimated at about 172 kg. In production, the market price of each part that makes up the trailer components, excluding resources, labour, taxes and transportation expenses, was investigated and the total cost of a single-axle trailer with a capacity of 700 kg was subtracted.