Hub and shaft-hub connection

A scientist from the Ostfalia University of Applied Sciences has developed a novel hub and shaft-hub connection, which enable a free from play transmission of relatively high torsional moments between a shaft and a hub. According to the invention, the hub can be manufactured cost-efficiently in large quantity and is optimized with regards to weight, mass moment of inertia, costs, materials and fatigue limit. The hub base body can be manufactured by injection molding from a plastic or a fiber-reinforced composite material and contains a cut, which is limited by at least one inner surface and has a cylindrical shape. Moreover, the hub has a clamping jig, which is used to deform at least one inner surface of the base body, leading to generation of a normal and frictional force between the shaft and hub inner surfaces. The inner surface of the hub base body is not stabilized directly on the shaft, but by using a contact element. The contact element acts between the hub base body and the shaft, which is placed in the cut of the base body. As a result, the contact conditions can be tailored advantageously. The contact element forms a frictional coefficient with the skin surface of the shaft, which is higher than the frictional coefficient of the plastic and the (metallic) shaft. This embodiment causes, that when using the same normal force in the contact area, i. e. the same stress of the base body plastic, a higher friction and thus a higher transmittable torsional moment can be achieved. The contact element can be shaped as a shell, foil, sheet plate or coating. Hence, it can be adapted to the needed application. Furthermore, the present invention suggests a group of hubs and shaft-hub connections, which enable a connection with shafts with various diameters, while the individual hub base bodies do not need to be adapted individually. In fact, the invention suggests that the individual hubs exhibit identical base bodies, which exhibit identical inner surfaces. In combination, contact elements with different radial dimensions can be adjusted to different diameters of the respective shafts.