Lifting mechanism for overhead monorail and overhead monorail

A lifting mechanism for an overhead monorail, the lifting mechanism comprising a lifting beam, a hanging portion, a hanging chain, a movable sprocket, a distance adjusting sprocket and a power mechanism, wherein

• the hanging portion is suspended below the lifting beam by the hanging chain, the hanging portion comprises a hanging base and a hanging member connected below the hanging base, and the movable sprocket is disposed on the hanging base;
• the distance adjusting sprocket and the power mechanism are arranged side by side and separately on the lifting beam, the power mechanism comprises a fixed sprocket and a driving portion configured to drive the fixed sprocket to rotate, and the fixed sprocket is driven by the driving portion to drive the hanging chain to move so as to lift or lower the hanging portion;
• an end of the hanging chain is fixed to the lifting beam, and the other end of the hanging chain engages the movable sprocket, the fixed sprocket, and the distance adjusting sprocket in sequence, or the other end of the hanging chain engages the movable sprocket, the distance adjusting sprocket, and the fixed sprocket in sequence,
• wherein two said hanging chains are provided, and two said hanging portions, two said movable sprockets, two said fixed sprockets and two said distance adjusting sprockets are provided, and each of the hanging portions comprises one hanging base;
• the power mechanism is located in a middle portion of the lifting beam, the two fixed sprockets are disposed side by side, the two distance adjusting sprockets are symmetrically distributed on both sides of the power mechanism, each of the two movable sprockets is disposed on the respective hanging base, and each of the two hanging portions corresponds to a respective one of positions of the two distance adjusting sprockets and is suspended below the lifting beam;
• and
• an end of each of the two hanging chains is fixed to a respective one of two ends of the lifting beam, and the other end of each of the two hanging chains engages a respective one of the movable sprockets, a respective one of the distance adjusting sprockets, and a respective one of the fixed sprockets in sequence.