Single rail shift operator assembly

摘要

A transfer case having a two-speed drive assembly includes a directly coupled shift operator with feedback. The shift operator includes an electric, pneumatic or hydraulic motor (130) which directly, rotatably drives a shift rail (126). The shift rail includes threads (24) and receives a shift fork (120) having complementary threads (122). The shift fork engages a dog clutch (104). Bi-directional rotation of the shift rail correspondingly bidirectionally translates the shift fork to select direct drive (high gear), reduced speed drive (low gear) or neutral operation of the two-speed drive assembly. A shift rail position sensor (144) provides data to associated logic and command circuitry regarding the actual position of the shift fork.