Electromagnetically releasable friction safety brake

Abstract

The invention relates to an electromagnetically releasable friction safety brake with two brake discs (2, 11) which are arranged on a common central drive shaft to be axially displaceable but non-rotatable with respect to the shaft. Axially disposed between the two brake discs (2, 11) in a spool carrier (5) is a magnetic coil (6) and springs (7) that urge the brake discs (2, 11) into the braking position. To solve the problem of simplifying such a brake further saving cost and space without detracting from the functional safety of the brake, it is envisaged that the electromagnet consisting of the magnetic coil (6) and the spool carrier (5) that surround the central shaft or hub are axially displaceable but non-rotatable in the brake, that a single armature disc (3) which is also axially displaceable but non-rotatable in the brake is arranged between the two brake discs (2, 11) and the magnetic coil/spool carrier, and that the springs (7) are tensioned axially between the magnetic coil/spool carrier, and the single armature disc (3). In an alternative arrangement, the drive shaft takes the form of a boss surrounding the brake assembly. Brake discs have radially outwardly facing splines that engage radially inwardly facing splines within the boss. In a linear version of the brake, the brake discs are replaced by the cables or webs of external equipment.

Dependencies are inferred from the claim text.