| 摘要 |
The invention relates to a device comprising a plain bearing (36), which contains ferromagnetic material and which is provided for radially supporting a shaft (34) that is made of ferromagnetic material. The shaft (34) is mounted in said plain bearing (36) in a manner that enables it to rotate and be axially displaced and has a free end (35). A footstep bearing is provided on the latter, comprises a step rounding (66),which is provided on said free end (35), and comprises a contact element (68, 69) that interacts with the step rounding. This contact element (68, 69) consists, at least in part, of a ferromagnetic material. In addition, at least one permanent magnet (72) is provided, which is placed in the area around the free shaft end (35) between the axial end of the plain bearing (36) at that location and the contact element (68) in order to form a magnetic circuit (82) starting from one pole (74) of the at least one permanent magnet (72) to the other pole (76) of the at least one permanent magnet (72) while passing via the plain bearing (36), the free shaft end (35), the step rounding (66) and the contact element (68). This results in inducing a defined magnetic attractive force between the step rounding (66) and the contact element (68). |
