Same-direction linkage door and belt wheel assembly thereof

The utility model provides a same-direction linkage door and a belt wheel assembly thereof, the same-direction linkage door belt wheel assembly comprises an installation plate used for being installedon the upper portion of a door leaf, a belt wheel, a connecting shaft and a thread adjusting piece, the belt wheel, the connecting shaft and the thread adjusting piece are arranged at the end, away from the door leaf, of the installation plate, and the connecting shaft vertically penetrates through the installation plate. Wherein the connecting shaft is arranged on the mounting plate and can movein the length direction of the mounting plate, the belt wheel is located above the mounting plate, the connecting shaft is sleeved with the belt wheel, the belt wheel can rotate relative to the connecting shaft, and the thread adjusting piece is used for pulling the connecting shaft to move in the length direction of the mounting plate so as to drive the belt wheel to tension a synchronous belt.In the utility model, the t