| 摘要 |
A door opening system includes a power transmission mechanism, a trolley, and a connecting arm. The power transmission mechanism includes a motor, a drive wheel driven rotatably by the motor, an indirect wheel, and a tension wheel. A transmission rope is trained on the drive, indirect and tension wheels in a closed loop such that parts of the transmission rope extend along a spiral path on the drive and indirect wheels, and do not contact each other, and such that rotation of the drive wheel drives the indirect and tension wheels rotatably. The trolley is coupled to the transmission rope, and is disposed between the indirect and tension wheels of the power transmission mechanism. The connecting arm has a first end coupled to the trolley, and a second end adapted to be coupled to the garage door. |
