| 摘要 |
An jam-tolerant actuator (2), comprises a housing (4), a first prime move r (6) for producing rotary motion, a first gearbox (10) arranged to convert in use the rotary motion from the first prime mover (6) into rotary motion. The first gearbox comprises a casing (14) mounted for rotation relative to t he housing (4) of the actuator (2) and a second gearbox (16) arranged to con vert rotary motion of the casing (14) of the first gearbox (10) into rotary motion. A brake (20) is arranged to act on the rotary motion from the second gearbox (16). In use when the first gearbox (10) is not jammed, the brake i s applied to resist relative rotation between the casing of the first gearbo x (10) and the housing (4) of the actuator (2). When the first gearbox (10) is jammed, the brake (20) is released thereby allowing the casing (14) of th e first gearbox to rotate relative to the housing (4) of the actuator (2). A second motor (22) may also be provided. |
