| 摘要 |
<p>The system is based on the use of two sets of roller bearings (2) and (3) with a small axial counter, which form two longitudinal and marginal rows in the drive line, roller bearings (2) being motorised and assembled on shafts (6), whereas roller bearings (3) are assembled with freedom of rotation on corresponding shafts (5). All the drive roller bearings receive movement through a chain (8). Each drive roller bearing (2) is provided with a series of axial lips (14) through which it is adapted to shaft (6), which lips are provided with metal rings (15) which press them against such shaft (6) forming a clutch device which determines drive transmission from the shaft to the roller bearing up to a specific torque, such torque having been exceeded, and due to the effect of the holding means of pallets (4), the roller bearings stop while their shafts (6) continue to rotate.</p> |
