Patent ID: 6688447
Filing Date: 2004-02-10
Classification: E06B,Y10T

Abstract:
An improved electrical rolling door transmission, having one door controller inside one FixDisc with one pair of transmission gearwheel, two cams, one positioning cover and two adjustable shafts, characterized in that:there is one flange ring on a low-speed gearwheel of said transmission gearwheel, within said transmission gearwheel a pair of raised pillars sit correspondingly to each other for said two adjustable shafts to slip on for revolving, a top of said two adjustable shafts is shaped as polygon with an external gearwheel fitted at bottom of each adjustable shaft; an inner toothed ring circles around inside said two cams, a barricade protrudes outward from each said cam, hitting against two antennas of a limiting switch, one said cam is fitted inside said flange ring of said low-speed gearwheel with said inner toothed ring clenching against said external gearwheel on one said adjustable shaft, a fillister exists between said two cams, connecting them together, said toothed inner ring for other said cam clenches against external gearwheel of other adjustable shaft, said two cams fixedly steadily by said positioning cover are positioned on said low-speed gearwheel for revolving; furthermore, two holes are bored through said positioning cover in correspondence with said adjustable shafts for them to expose out of said positioning cover, allowing a maintenance worker to revolve and adjust limiting positions for said two cams.