Vertical lifting and clamping mechanism for cementing machine

The utility model provides a vertical lifting and clamping mechanism for a cementing machine. The vertical lifting and clamping mechanism comprises a main shaft and a driven shaft, wherein transmission pieces and gears are arranged on the main shaft and the driven shaft; each transmission piece is fixedly connected with the corresponding main shaft or a corresponding transmission shaft; each gear is movably connected with the corresponding main shaft or transmission shaft; a boss is formed on one surface of each transmission piece; an arc-shaped chute or an arc-shaped through hole is formed in the surface of each gear; each boss is positioned in the corresponding arc-shaped chute in a sliding mode; each gear is driven to rotate by the corresponding transmission piece; and the tooth part and the rack part of each gear are always meshed with each other in the rotating process of the gear. The vertical lifting and clamping mechanism disclosed by the utility model has the beneficial effects that the probability of tooth clamping between the rack part and the gear caused by human reasons is reduced.