Patent ID: 7762154
Filing Date: 2010-07-27
Classification: F16H,Y10T

Abstract:
1. A synchromesh automatic transmission comprising: a plurality of shift forks for changing a shift stage; a plurality of shift lugs which are provided to drive said each shift fork and are aligned in a row; a shift finger which is engaged with one of said plurality of shift lugs and displaces a corresponding shift fork to a shift position; and a selector shaft which is elongated along the row of the shift lugs, supports the shift finger so as to be displaced in a selection direction and enables the shift finger to be selectively engaged with one of said plurality of shift lugs, wherein the synchromesh automatic transmission further comprises: a lug lock portion which is engaged with the shift lug separately from the shift finger and enables the shift fork to be controlled so as to be located at a neutral position; a shift selector mechanism which achieves a target shift stage by engaging the shift finger with the shift lug of the shift fork corresponding to the target shift stage and displacing this shift fork in a shift direction; and an interlock mechanism which controls a shift fork that is different from the target shift stage so as to be located at a neutral position by displacing the lug lock portion following movement of the shift finger in a selection direction and engaging this lug lock portion with the shift lug of the shift fork that is different from the target shift stage.