Lock construction for a power shovel

Power shovel comprising a front (2) and rear (1) part pivotably joined to one another. Locking thereof is obtained in that one of the parts is provided with a locking arm (15) that is pivotably fitted thereon and that is provided at the free end with an opening through which a pin (22) can be fitted. This pin can also be fitted through a lug (13) in the other part, as a result of which locking is obtained. According to the invention it is proposed to obstruct misuse of the power shovel by making removal of said pin possible only by removal of a lock (20) interacting therewith.