Elevator transmission transition connecting device

A transmission transition connecting device of an elevator comprises a main shaft end half coupling and a plurality of pin bushes, the main shaft end half coupling is installed on a main shaft device of the elevator through the pin bushes under the matching action of bolts, the main shaft end half coupling is provided with a plurality of connecting cylindrical holes used for installing the pin bushes, through holes are formed in the pin bushes, and internal threads are arranged in the through holes. The front end of the pin sleeve is provided with an inclined face which plays a guiding role during installation, the rear end of the pin sleeve is provided with a protruding edge, the side, away from the elevator main shaft device, of the main shaft end half-coupling is provided with a speed reducer end half-coupling used for being connected with a derived planetary gear speed reducer, and a second inner gear ring is installed on the speed reducer end half-coupling. The transmission transition connecting device o