Protective device for accidental movement of lift car

The utility model discloses a car accidental movement protection device, and belongs to the technical field of elevator cars. Comprising an elevator car, a car protection layer is arranged at the bottom end of the elevator car, an anti-falling structure is arranged on the inner side of the car protection layer, and the anti-falling structure comprises a transverse limiting part and a longitudinal limiting part. The transverse movement force of the limiting clamping plate can synchronously drive the positioning gear to rotate, the positioning gear rotates to drive the positioning clamping plate to move reversely, the positioning clamping plate moves reversely to push the supporting blocks, and the supporting blocks support the four corners of the bottom end of the car protection layer until the limiting clamping plate and the elevator shaft are clamped. And meanwhile, the limiting clamping plates move to drive the positioning plates to move, the positioning plates move to drive the auxiliary supporting columns