Lifting mechanism for automatic mahjong machine

The invention discloses a lifting mechanism for an automatic mahjong machine. Rails and rollers are arranged between a rotating disc and the hole wall of a main shaft seat; the rollers contact with the lower surfaces of the rails; the inclined rails are uniformly distributed on the rotating disc; the rollers are uniformly distributed along the hole wall of the main shaft seat; a circumferential angle corresponding to each rail is 90 degrees; cushioning rails are respectively arranged at two ends of the rails; the shaft of a two-way motor is meshed with an internal gear of the rotating disc; a tension spring is arranged between the two-way motor and the main shaft seat; a circuit board controls the switching of the two-way motor; the circuit board is connected with two vertically arranged Hall elements. The lifting mechanism has the advantages that mounting and motion space is greatly saved, lifting motion is accomplished through rotation motion, a plurality of contact surfaces can ensure that a dice disc is stably lifted, the Hall elements and a magnet are matched to control the rotation of the two-way motor and the positive and negative rotating motion of the two-way motor, the stable and accurate operation of the dice disc is guaranteed, and meanwhile, arranging the rails on the rotating disc is convenient for the rails to be mounted and fixed.