Drive assembly for locking one or several operating units of an agricultural implement or of a self-propelled implement

A drive assembly driven by a drive unit for locking one or several operating units of an agricultural implement or a self-propelled implement in a driveline, said drive assembly comprising:

• an overload coupling connected to a drive unit and driven by said drive unit in one driving direction of rotation, and said overload coupling connected to an operating unit and said overload coupling being self-actuating and disconnecting when a specific torque limit is exceeded;
• a brake unit connected to the overload coupling, said brake unit including a friction brake member biased directly by a spring in a braked position, said brake unit adapted to be arranged in the driveline between the overload coupling and the operating unit, such that when said brake unit is in a braked position, said overload coupling is disconnected and torque is not provided to said operating unit;
• an actuating mechanism for actuating the brake unit, said actuating mechanism being activated to move said brake unit into a release or unbraked position which enables torque from said overload coupling to pass to said operating unit for running the operating unit, and when the actuating mechanism is deactivated, the brake unit is braked and locked by the spring engaging the friction brake member causing the overload coupling to be disconnected.