SLIP COUPLING FOR A WORK MACHINE

A slip coupling for a work machine includes a main clutch in the form of a friction-based and spring-operated slip clutch. The slip coupling further includes an auxiliary clutch configured to maintain a pre-set spring-induced clamping force on friction plates of the slip clutch, when the slip coupling rotates in a forward direction, and further configured to be able to increase the spring-induced clamping force, when the slip coupling rotates in a reverse rotational direction. The increase of the clamping force is enabled by the fact that one of two auxiliary clutch parts is axially movable when the slip coupling rotates in the reverse rotational direction, the axial movement actuating an increase in pre-tension of mechanical spring or springs of the slip clutch. A work machine such as a combine harvester equipped with the slip coupling is also described.