| 摘要 |
Door closer with a spring system that must be stretched when the door is open and supplies the closing moment necessary to close the door. There is provided a gear train between the spring system and the door to influence the force curve which varies over the opening angle of the door, whereby the gear train that varies in its translation ratio over the opening angle of the door has a first and a second gear wheel that mesh with each other and are each formed by a circular gear rim and are mounted eccentrically with respect to their centers while retaining the axial distance between them. The first gear wheel is connected with an output shaft and the second gear wheel is connected coaxially with respect to its center of motion with a gear wheel that is engaged in a rack that is coupled with the spring system. The axis of rotation of the output shaft runs through the center of motion of the first gear wheel, and all of the above elements are arranged so that the eccentricity e of the gear wheels that results from the center of a gear wheel and the center of motion is point-symmetric to their pitch point. |
