| 摘要 |
1,230,009. Convertiplane blade folding actuator. UNITED AIRCRAFT CORP. 20 Sept., 1968 [12 Oct., 1967], No. 44755/68. Headings B7G and B7W. [Also in Division F2] An actuator unit especially adapted for folding helicopter rotor blades as disclosed in Specification 1,230,010 comprises two rotary output shafts 220, 222 driven through a planetary gear system by either motor 250 or 252, and two linear motion outputs 162, 296 which operate rotor blade locking mechanisms (not shown) and are driven by cams. A planetary gear 264 supported in a cage 268 may be driven either by a sun gear 260 splined on to shaft 254 of motor 250, or by a ring gear 310 driven by a gear 319 splined on to shaft 302 of motor 252. Output shafts 220, 222 are initially stationary, each being connected to two rotor blades locked against motion (not shown), so that initial motion of planetary gear 264 drives ring gear 274, and a contoured cam surface 414, Fig. 7, engages a cam follower 281 to produce a linear output at 162. This linear output unlocks the rotor blades attached to output shaft 220, and further rotation of ring gear 274 causes an end of a circumferential slot 276 in the ring gear to drive output shaft 220 via a pin 278 mounted on output shaft 220. Rotation of output shaft 220 continues until the rotor blades attached thereto reach a stowed position, and at the end of this rotation contoured cam surface 294 on shaft 220 operates cam follower 293 to produce a linear output 296 and unlock the rotor blades attached to shaft 222. Output shaft 222 is then driven until the rotor blades attached thereto are also stowed. |
