| 摘要 |
A lead screw and nut assembly (10) for converting a rotary input into a linear output, includes an involute-heliocoidal lead screw (12), and a nut assembly (14). The nut assembly (14) includes an annular ring (50) and a number of grooved rollers (40) congugate to the thread on the lead screw (12). The annular ring (50) is mounted in bearing means (60) located in an outer housing (30, 32) of the nut assembly (14) so that it can rotate freely. Rolling line contact is established between the lead screw (12), the rollers (40) the ring (50) and the outer housing (30,32) for the transmission of major forces in the axial direction of the lead screw. |
