Series lifting device

The utility model discloses a serial lifting device, and relates to the technical field of in-vitro diagnostic equipment. The device comprises a mounting rack; the first driving assembly is fixedly assembled on the mounting frame; the transmission shaft is in transmission connection with the power output end of the first driving assembly; the second driving assembly penetrates through the transmission shaft and can move along the transmission shaft under the driving of the first driving assembly or the driving of the second driving assembly; the first execution component is assembled on the mounting frame in a sliding manner and is assembled with the second driving component; the motion form conversion piece is assembled on the transmission shaft and is used for converting the rotation of the transmission shaft into the linear motion of the transmission shaft; and the second execution part is assembled on the mounting frame in a sliding manner and is assembled with the motion form conversion part. The technic