Be used for low resistance large -span cigarette air duct baffles door

The utility model provides a be used for low resistance large -span cigarette air duct baffles door, including the air door casing, the baffle blade, the transmission shaft, rolling bearing unit, thesupport, link mechanism and drive shaft, the transmission shaft is installed respectively at the both ends of baffle blade, install on the air door casing through the rolling bearing unit who runs through the setting on the transmission shaft, still be provided with the support between rolling bearing unit and the air door casing, install the crank on the transmission shaft, parallel arrangement has a plurality ofly about the baffle blade, a plurality of settings are connected through the connecting rod of vertical installation between two adjacent cranks with one side, the drive shaft is installed in occasionally on the transmission shaft on one of them the baffle blade of the latter half in the setting. The utility model discloses simple structure, directly perceived, it is convenient tooverhaul, maintain, and s