| 摘要 |
A ball return channel of a ball screw is formed within a nut (1) and a ring-shaped non-contact seal (4) is arranged at the axial both ends of the nut (1). A suction hole (7) radially penetrating the nut (1) is formed within the range of a raceway (a rolling channel formed by a spiral groove (1a) of he nut (1) and a spiral groove (2a) of the screw shaft (2)). This guarantees not to emit dust produced inside the nut, and attains dust reduction effect higher than that of the conventional ball screw. |
