Self-locking mechanism of elevator

The utility model relates to the technical field of elevators, and discloses a self-locking mechanism of an elevator, which comprises a limit locking device, the limit locking device comprises a lantern ring, the left end of the lantern ring is fixedly connected with a support plate, the middle part of the lantern ring is provided with a groove, the lantern ring is fixedly connected with a telescopic rod I at the groove, and the telescopic rod I is fixedly connected with a telescopic rod II at the groove. A second telescopic rod is slidably connected to the interior of the first telescopic rod, a rotating ring is rotatably connected to the outer surface of the lantern ring, two connecting rods are hinged to the inner side of the rotating ring, supporting columns are movably connected to the middles of the connecting rods, and clamping strips are hinged to the other ends of the connecting rods. According to the self-locking mechanism of the elevator, by rotating the rotating ring, the rotating ring drives the