Secured locking system

A mechanical locking system (1) for establishing a secure connection with a circumferential groove (9) having journals (7) has a bearing bush (11) having an interior region (21) for receiving the bearing pin (7) comprising an annular recess means (14 ), wherein the recess arrangement (14) connected state of the peripheral groove (9) is arranged opposite in a (with the bearing pin 7) on. Further, it has, in the opening configuration (14) arranged locking balls (17), connected in one with the journal (7) state, engaging the groove (9), one on the locking balls (17) acting biasing means (19), one in a securing position displaceable locking sleeve (23) for fixing the positions of the locking balls (17), and a locking mechanism (25) with a mounting position and a secured position to, wherein the locking mechanism (25) for shifting the locking sleeve (23) formed in the securing position, ,