| 摘要 |
A roller screw actuator comprises a screw (112), a nut (114) coaxial with the screw and an outer drive member (202) rotatably supported on the nut. Several planetary rollers (116) are rotatably engaged between and with the screw and the nut. A gearing system (119) couples the planetary rollers to the outer drive member (202) and the nut, the arrangement being such that in a first, unjammed condition and in a second, jammed condition, the lead rate of the screw actuator is maintained substantially constant.
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