Pole friction brake or coupling e.g. in office machinery, has armature frictional coating, and third frictional coating on housing with spring loading so that it protrudes above second frictional surface by defined amount

摘要

The brake or coupling has an armature (7) seated on a first shaft (8) with a first frictional surface that can be brought into frictional contact with a housing with a second frictional surface (1a,1b) by electromagnets or permanent magnets for force transfer. A third frictional coating (5) on the housing is attached to the housing with a spring (6) loading so that it protrudes above the second frictional surface by a defined amount.