摘要 |
<p>The roller has a rotatable rolling part (9) and a rotatable drive section, where a torque is transferred from the section to the part (9) through plastic parts (7, 11) and rotation-symmetric conical surfaces (8, 12). The surfaces (8, 12) and the parts (7, 11) are arranged on the section and the part (9) respectively, where the surfaces and the parts have two selectable states, and the surfaces are made of plastic e.g. polyoxymethylene. The torque is transferred by kinetic friction in one state, and the section and the part (9) are torque coherently connected with one another, in the other state.</p> |