| 摘要 |
A hub (1) in particular for marine propellers (4) comprises an inner hub (2) adapted to be firmly mounted on a drive shaft (5), an outer hub (3) arranged about said inner hub with a gap (18) and carrying the propeller (4), and an elastomeric bushing (6) arranged in the gap (18) and connected with both the inner hub (2) and the outer hub (3) by means of e.g. adhesion or vulcanization. The elastomeric bushing (6) extends axially only along part of the gap (18), and at least one radially outwardly extending projection (12) on the inner hub (2) is firmly mounted in the gap (18) at the side of the elastomeric bushing (6) and correspondingly at least one radially inwardly extending projection (15) on the outer hub (3). The combined radial extent of the associated projections (12, 15) is greater than the radial width of the gap (18), and the projections (12, 15) moreover overlap each other in the longitudinal direction of the drive shaft and are positioned at a mutual angular distance at any rate in the rest position of the propeller. The torsional moment to which the elastomeric bushing (6) is subjected is hereby restricted to a predetermined maximum size, so that the bushing is never overloaded and is thus not liable to be destroyed, and the power transmission between the drive shaft (5) and the propeller (4) is maintained under any circumstances, even if the elastomeric bushing (6) should fail. |
