| 摘要 |
Rotational power is transmitted to a roll of the type having a cylindrical, hollow shell rotatably mounted on a stationary, central through-shaft by a gear system composed of an internally spur gear affixed to the shell, a pair of pinion gears mounted for rotation by self-aligning bearings carried on shafts affixed to the through-shaft of the roll and an external spur gear positioned within a cavity in the main shaft. The pinion gears partially project through openings formed in walls that define a cavity in the shaft, and the axis of each pinion gear shaft is oriented parallel to the shell of the roll in a plane that is perpendicular to the plane along which the shell and shaft will deflect when loaded. The external spur gear is connected to a drive shaft that is composed of two portions connected to each other by a universal coupling, the portion of the drive shaft carrying the external spur gear thus being mounted for articulation relative to the main power input shaft. The elements of the gear system are maintained in parallel relation to each other and in proper mesh, regardless of the extent of deflection of the shell and through-shaft of the roll under load. |
