With the development of Swedish society, many people and organizations pay more attention to life quality of people with disabilities. Wheelchairs play irreplaceable role in aiding people for few decades. Therefore, the upgrade and refreshment of wheelchair function and mechanical structure will be a priority for community and welfare institution. Wheelchair has a variety range of styles in current market. Aluminium, steel and lightweight solid are the common materials in manufacturing. It can also be classified by functions: manually operable wheelchairs and Electrical controlling...