Square multi-cylinder elevator with dust cover

The square multi-cylinder lifter comprises a base, a protective outer frame, lifting motors and the dustproof outer cover, the lifting motors are distributed on the surface of the base in a rectangular mode, a supporting frame is connected to the middle of the base, and an adjusting mechanism used for adjusting the position of the protective outer frame is arranged on the surface of a rotating plate; a dustproof outer cover and a protective outer frame play a role in blocking dust, a lifting motor and an adjusting mechanism on the surface of a rotating plate are protected against corrosion of external dust, meanwhile, the effect of blocking dust is achieved, and the lifting motor is arranged in a rectangular distribution mode, so that a fixing plate is evenly stressed; the phenomenon that the fixing plate inclines due to too large local acting force is reduced; in addition, through a rotating assembly and an adjusting mechanism, the effects of rotating the protective outer frame, adjusting the angle and finel