| 摘要 |
<p>A non-jamming rotary mechanical actuator, e.g. for aircraft control surfaces, includes a pair of fixed ring gears (32, 36) separated by a moveable ring gear (34). An end plate (44) having a central bore therethrough and a bearing member (46) for rotatably supporting a shaft (30) is mounted at each outer side of said pair of fixed ring gears (32, 36). Each ring gear (32, 34, 36) has an internal gear surface (33, 35, 37). The shaft (30) is associated with an inner cam member (52) having a first offset (X), and an outer cam member (54) having a second offset (Y). In driving relationship with said outer cam member (54) is a compound gear (64) having three sets of gear teeth (65, 67, 69) for intermittent contact with said internal gear surfaces (33, 35, 37) of the three ring gears (32, 34, 36). A shear member (60) is provided in slots in the inner and outer cam members (52, 54). A series of such actuators may be provided on a common shaft (30), so that should any of the actuators become jammed, its respective member (60) will shear, permitting the shaft (30) to continue rotation providing torque to the remaining actuators, and permitting the moveable ring gear (34) to continue moving with the load.</p> |
