| 摘要 |
A DRIVE UNIT FOR AN ENDLESS CONVEYOR A drive unit having a toothed endless member for driving a conveyor. The drive unit includes an endless driving chain having tooth-like projections extending outwardly from the driving chain, each tooth-like projection having a bearing surface which coacts with the toothed side of the endless member to drive the endless member in response to movement of the driving chain. The driving chain engages a pair of sprockets to be moved around each in response to the rotation of one of the sprockets by a drive motor. Each tooth-like projection is inserted into or removed from a respective groove defined by the teeth of the endless member when that tooth-like projection is advanced around a circular path defined by the endless chain driven around one of the sprockets. During its transfer from the circular path to a linear path of travel between the sprockets the bearing surface of each tooth-like projection is urged into bearing against the forward tooth of the endless member defining the respective groove in which its tooth-like projection is inserted. A load support section disposed between the sprockets coacts with the drive chain to maintain their bearing surfaces in bearing with the teeth of the endless member as the bearing elements are advanced between the sprockets. |
