Platform lifting system

A platform lifting system (100) for transporting a person or an object from at least a first level to a second level, wherein the platform lifting system comprises:

• a drive unit (200),
• a platform (300),
• at least two vertical columns (400), wherein said columns are adapted to facilitate an up and a down movement of the platform (300),
• a drive system (500) positioned on or within at least one of the two columns, wherein said drive system is adapted to facilitate the up and down movement of the platform,
• wherein the drive system (500) is a closed end belt system comprising a toothed belt (520) and a corresponding belt drive (510);
• the belt drive (510) comprises a rotatable drive wheel (512), a first set of a plurality of deflection wheels (514), a second set of a plurality of deflection wheels (516), and a frame (517), the frame holds the drive wheel (512) and the deflection wheels (514, 516),
• the rotatable drive wheel (512) is arranged between the first set of the plurality of deflection wheels (514) and the second set of the plurality of deflection wheels (516),
• the rotatable drive wheel (512) is connected to the drive unit (200) and is in a drive-transmitting engagement with the toothed belt (520),
• the toothed belt (520) enters the belt drive (510) at a first opening (522), with the toothed belt moving in a first direction (523), and the toothed belt leaves the belt drive, at a second opening (524), with the toothed belt moving in a second direction (525),
• wherein the first set of the plurality of deflection wheels (514) deflects the toothed belt (520) from the first direction (523) to engage the drive wheel (512),
• the second set of the plurality of deflection wheels (516) deflects the toothed belt (520), when the toothed belt is moving away from the drive wheel (512), so that the toothed belt is moving in the second direction (525), and
• wherein the first set of the plurality of deflection wheels (514) are fixed at fixing points that are points on a partial circle, wherein the radius of the partial circle is larger than the radius of the drive wheel (512).