Synchronous lifting mechanism

The utility model discloses a synchronous lifting mechanism comprising at least two lifting rod devices, wherein each lifting rod device comprises a rack lifting rod and an input gear engaged with the rack lifting rod, the lower part of the rack lifting rod is provided with a positioning lock groove, the input gear is connected with a transmission shaft, the input end of the transmission shaft is connected with a set of power device, and each lifting rod device is also provided with a locking positioning device moveably connected with the positioning lock groove. In the utility model, the multipoint synchronous lifting rod devices realize large-stroke lifting height by adopting gear and rack devices, and simultaneously the multipoint synchronous lifting rod devices share one set of power device so as to ensure the synchronism of the lifting rod device at each point. The synchronous lifting mechanism achieves the purposes that after the stroke of lifting is accomplished, the locking positioning device is used for limiting the lifting rods in an axial direction so as to ensure that the lifting rods can not be axially displaced in an assembly process. The synchronous lifting mechanism has the advantages of stable workpieces in a lifting process, large stroke of lifting and high rigidity of system, thereby being capable of well meeting technological requirements.