| 摘要 |
<p>A drive assembly (70, 170, 270) for a passenger conveyor includes a plurality of pallets (22) defining a longitudinal pallet path (36). First and second cog-link assemblies (100, 102) include a series of first pins (106) and a series of second pins (112), respectively. First and second drive sprockets (90, 94) operatively engage the first and second pins (106, 112). A motor (72) is operatively coupled to the first and second drive sprockets (90, 94) by a gear drive configured to rotate the drive sprockets (90, 94) in opposite directions. The drive sprockets (90, 94) may rotate about sprocket axes that are substantially perpendicular to a longitudinal pallet path (36), thereby giving the assembly a low height profile. The pins (106) of the cog-link assemblies (100, 102) may be spaced at a reduced pitch distance, thereby reducing vibration and noise caused by the polygon effect. Simultaneous engagement between two drive sprockets (90, 94) rotating in opposite directions and the cog-link assemblies (100, 102) provides a self-alignment feature for the drive assembly (70, 170, 270).</p> |
