Door and window lifting power transmission device

The utility model relates to the field of door and window profiles, and particularly discloses a door and window lifting power transmission device, which comprises a double-head stepping motor, and is characterized in that two ends of the double-head stepping motor are connected with transmission rods, one torsion output end of each transmission rod is connected with a 90-degree right-angle planetary reducer, and the other torsion output end of each transmission rod is connected with a transmission shaft. The output end of the 90-degree right-angle planetary reducer is connected with a lead screw linear assembly. Compared with a rotating wheel lifting structure adopted in the prior art, according to the scheme, the double-end stepping motor and the transmission rods at the two ends drive the lead screw linear assemblies through the 90-degree right-angle planetary speed reducers to achieve lifting of the door and window, and due to the fact that the structure is very simple and compact, mounting and dismountin