| 摘要 |
<p>The invention relates to an arrangement for the supply of pressure oil from a stationary pressure oil source to a rotating shaft (1). Such arrangements are used, for example, for the actuation of a rotary pressure oil cylinder forming part of a hollow chuck assembly. They comprise a pressure oil transfer housing (7) on the shaft (1), which housing is provided on the outside with at least one pressure oil connection and on its bearing surface with at least one annular transfer groove (11), which co-operates with at least one bore in the shaft for the transfer of pressure oil between the housing (7) and the shaft (1). Between the shaft (1) and the pressure oil transfer housing (7) a sealing ring (14) with a passage in the region of the transfer groove (11) is provided, and, at which at both ends is arranged respectively at least one row of roller members (15), which roll both on the bearing surface of the shaft (1) as also of the pressure oil transfer housing (7). By this means the relative motion between the rotary and stationary parts is reduced, and the friction forces decreased. <IMAGE></p> |
