Adjustable work surface with slippable belt drive

摘要

The position of the working surface of a work desk or table is adjustable by one or more adjusting arrangements which are driven via a belt transmission by a drive mechanism. The belt transmission includes a preferably toothed belt 28 connecting a drive gear or pulley 21 receiving power from the drive mechanism and one or more adjustment gears and/or pulleys 30, 31, 32 of the adjustment mechanism. The belt is configured to slip on at least one of the gears and/or pulleys, preferably on the drive gear 21, when overloaded so that the mechanisms are not damaged. The tension of the belt can be adjusted by a tensioning arrangement such as being able to move the position of the idler pulleys.