Abstract: An actuating unit for locking a component of a construction machine, in particular a road milling machine or a surface miner, the actuating unit comprising a retaining part for fastening to the construction machine. A self-propelled construction machine, in particular a road milling machine or a surface miner, comprising at least one actuating unit of this type. The basic principle of the actuating unit is the design of the cylinder of a piston/cylinder arrangement as a “locking bolt”. In the actuating unit, a piston is connected to the retaining part and is surrounded by a cylinder, with a first cylinder chamber being formed on one side of the piston and a second cylinder chamber being formed on the other side of the piston. A cut-out which extends in the direction of the longitudinal axis of the cylinder and through which the retaining part extends is provided in the cylindrical wall of the cylinder.

Abstract: The invention relates to an actuating unit for locking a component of a construction machine, in particular a road milling machine or a surface miner, the actuating unit comprising a retaining part 26 for fastening to the construction machine. Furthermore, the invention relates to a self-propelled construction machine, in particular a road milling machine or a surface miner, comprising at least one actuating unit of this type. The basic principle of the actuating unit according to the invention is the design of the cylinder of a piston/cylinder arrangement as a “locking bolt”. In the actuating unit according to the invention, a piston 27 is connected to the retaining part 26 and is surrounded by a cylinder 30, with a first cylinder chamber 31 being formed on one side of the piston and a second cylinder chamber 32 being formed on the other side of the piston.