| 摘要 |
An opening and closing apparatus for a ventilation widow of a plastic greenhouse is provided to control the degree of opening and closing of the ventilation window with ease and accuracy by a controller, control the rotation of a motor through the controller and prevent false operation and life shortening of a limit switch. A ventilation window opening and closing apparatus(A) for plastic greenhouse comprises: a body(10) in which a connecting shaft and rotating shaft(11) are embedded by meshing a first connecting gear formed in the middle of the connecting shaft with a first rotating gear formed in the middle of the rotating shaft; a motor(20) connected to the lower one side of the outside of the body to allow a coupling gear of a motor shaft to be in mesh with a second connecting gear; a cover(30) connected to one side of the body to insert a front edge of the motor shaft in a metal boss into a through hole(31) through a front end of the rotating shaft; and a controller(40) comprising a plurality of knobs(41,41') with a knob gear, limit switch and air exhaust pipe(44) to allow the knob gear of each knob to be in mesh with the second connecting gear. |
