| 摘要 |
The insert has an energy storage unit i.e. torsion spring (7), which is in operative connection with a vertically guided door (1) utilized for closing a feeding opening. A drive (8) is in engagement with the door and/or the energy storage unit, where the drive is provided with a transmission ratio which changes with the movement of the door. The drive has two gear wheels (11, 12) with respective segment gears of different pitch circle radii. The drive is formed as a mechanical drive, a cam mechanism, a gear drive such as eccentric or elliptical gear drive, or a linkage such as four-bar chain. |
