| 摘要 |
An inner hub (4) has an axle (8) and outer surface (11) in which first and second raceways (12,13) alternately run round the axle. The first raceways run from the drive-side end towards the driven side end. The second inner raceways run from the driven side end towards the drive side end. The outer hub (7) has an axle and inner surface in which first and second raceways (18,19)alternately run round the axle. The first and second inner raceways are opposite second outer raceways and form a pair each. The first outer raceways run from the drive side end towards the driven side end. An annular cage (5) has a spherical outer surface between the inner and outer hubs and has radial windows in which balls (6) fit into the raceways. |
