Fundament för kompaktkran : En universell lösning

Sammanfattning: This thesis describes the universalization, improvement and further development of a compact crane support frame for flatbed trucks. The work has been conducted at El och Fordonsteknik AB (henceforth EFAB) in Uppsala. The aim of the work has been to shorten the assembly time of the product. By doing so, the product can be kept on shelf, which in turn results in shorter lead time. This has been done by universalizing the support frame to be compatible with most of the chassis EFAB works with. Additionally, the entire construction has been made lighter, which will make it a more attractive choice for customers. A pre-study was conducted and information was gathered internally, as well as externally, in order to ascertain that no limitation or possibility was overlooked during the course of the project. One such limitation has been the geometry of the truck bed that the support frame shall be compatible with. This has set the focus of the project more towards further developing and improving the already existing product rather than developing a brand new one. The project has resulted in a compact crane support frame that fits eight different chassis and is 22 kg lighter than its predecessor. The assembly time has been approximated to 60 % of that of the original product. No prototype test has been conducted due to the lack of a suitable vehicle and time. However, theoretical comparisons done through the use of 3D CAD and FEA suggest that the new support frame is a worthy replacement for the previous one.