Electromagnetic friction clutch having oscillating pole faces

摘要

An electromagnetic friction clutch (1) is proposed having two clutch plates (2, 8) which have concentrically circular, magnetically soft ring areas (3a-3c, 9a-9d) which are at least partially magnetically insulated from one another, which friction clutch (1) transmits comparatively large torques while having a compact design. For this purpose, pole faces (4a-4f, 10a-10f) which, when viewed in the radial cross section, oscillate in the axial direction are formed at the magnetically soft ring areas (3a-3c, 9a-9d).

主权项

1. An electromagnetic friction clutch having two clutch plates (2, 8) having a plurality of concentrically circular, magnetically soft ring areas (3a-3c, 9a-9d) which are at least partially magnetically insulated from one another, wherein a first clutch plate of the two clutch plates comprises an axially movable armature plate (2) which has at least one magnetically conductive ring area (3a-3c) which magnetically connects two magnetically insulated ring areas (9a-9d) of the second clutch plate (8), wherein, the clutch plates (2, 8,) have, when viewed in a radial cross section, oscillating pole faces (4a-4f, 10a-10f) which are uniformly smooth in the circumferential direction, at the magnetically soft ring areas (3a-3c, 9a-9d, 19), via which attraction occurs during shifting of the clutch, wherein radial cross-sectional profiles of the two clutch plates (2, 8) are matched in an accurately fitting fashion to one another at least in the region of the pole faces (4a-4f, 10a-10f).