Electric shift control assembly

摘要

Shift control assembly for a power transmission device includes an electric drive motor (114) and gear train (120,128,138) having an output which is coupled to and bi-directionally rotates a shift rail (180). The shift rail includes a pair of spaced-apart cam followers (194). Freely rotatably receiving the shift rail and disposed thereon between the cam followers is a shift fork assembly (200). The shift fork assembly includes a body having a pair of spaced-apart helical cam surfaces engaged by the cam followers and a fork engaging a shift clutch collar. As the shift rail rotates bi-directionally, the shift fork assembly and clutch collar bi-directionally translate. A circular plate (154) is disposed for rotation with the shift rail and includes an array of apertures. A plurality of sensors (160) are disposed in adjacent, sensing relationship to the circular plate. As the circular plate and shift rail rotate, the sensors generate unique combinations of signals corresponding to a plurality of specific angular positions of the shift rail and translational positions of the shift fork.