Self-locking mechanism of hydraulic elevator

The utility model belongs to the field of elevators, particularly relates to a self-locking mechanism of a hydraulic elevator, and aims to solve the problems that a motor and gears in an existing locking mechanism are exposed outside, foreign matters easily fall into a plurality of meshed gears and are clamped among the meshed gears during use, the meshed gears are easily abraded, and the service life of the gears is influenced. In order to solve the problems that in the prior art, the service life is shortened, according to the scheme, the device comprises two supporting frames and a box body, the two sides of the box body are each fixedly connected with two connecting blocks, the sides, close to each other, of the two supporting frames are each provided with two guide rail grooves, and one sides of the connecting blocks are slidably connected with the inner walls of the guide rail grooves; the self-locking mechanism is arranged on the box body and used for locking the box body; and the protection mechanism