The project was performed in collaboration with Husqvarna, one of the world’s leading manufacturer in the market of electric outdoor products. The report is a thesis work of a bachelor mechanical engineer program, in the field product development and design. The project is a study of the development opportunities within drive belt for a gear driven gearbox to one of Husqvarnas petrol powered hedge trimmers. A big part of the project was also to find combinations of materials for all components in the gearbox, to reduce weight and maintain or improve the performance of the system. Belt drive was of interest to investigate as an alternative solution to the current design that can reduce wear on the system at a performance test performed in the company before the product is released to market. Direct surface contact as a result of gear drive causes a great wear on the gear teeth in the performance test. Reducing weight was also of interest because it is a major competitive advantage in the market. The work began with a pilot study within and outside the company to increase vision field and get a better understanding of the product. The project was carried out in the company, with continuous guidance and advice on the authors' concept generation and work. In this report, readers can get access to how the work was done from start to the final concept that has been modeled in the CAD program CATIA. In the design process and the results, readers can take part in the construction of the new design, the material selection of each component, a comparison of the conceptual and ordinary gearbox weight and also comments on performance test with belt drive.

ROL Ergo is a company that belongs to the ROL Group concern. They develop and manufacture products for the office furniture market and their main focus is on electrically height adjustable desk stands. They also develop products for personal use, often in collaboration with other companies.The products that ROL Ergo develop are all quite robust and stable, which are qualities often associated with weight. As the E-commerce is increasing in popularity, ROL-Ergo will have to adapt and further improve their products to keep up with it. This means that their product needs to decrease in weight, but without compromising their other qualities. To accomplish this, well thought-out weight reductions must be made on their components.The desktop stand that this report covers consists of many different components. However, the main components consist of the foot, leg, frame, and strut. There is also a motor housing, containing the electric engine used adjust the table, that connects the leg with the frame and strut. The foot, frame and strut are some of the heaviest and least complex components of the stand, and therefore suitable to perform weight reduction on.This report covers the work that was done to analyze the current components, as well as the design and development process to generate a new weight-improved design. To begin with, the analyzing of the current components consisted of getting an understanding of their purpose and what stresses they are subject to. Simulations were done to determine this, and the results from these were the basis as well as point of comparison for the new concepts.As the project finished, new weight improved concepts for the foot, strut and frame with new designs had been developed. Combined with the current remaining parts of the desk frame, it led to a significant total weight reduction. All the new components were compared to the already existing ones through simulations.